This is a superb miniature of a very rare old US classic, in any kind of such aesthetic presentation and quality. The crystal is perched aesthetically on drusy, brassy yellow pyrite. It is a robust crystal with iridescent, bluish purple oxidation colors of the covellite, measuring fully 3.4 cm across. Slight contact/damage on the left edge does not materially detract from the quality of the specimen. Ex. Charlie Key collection (label from the 1960s) and Dr. Steve Smale collections. For my taste, this is as fine a miniature as I can imagine for a Montana covellite. It has color, form, contrast, and display style! Actually, it looks good from EITHER side, as well.
A SUPERB, incredibly sharp cluster of lustrous blades of Wolframite from old mining here back in the 1990s. The blades range up to 5.5 cm long and 2 cm wide, and the edges, seemingly beveled in appearance, are super-sharp. Associated with the Wolframite are crystals of Arsenopyrite up to 5 mm, Pyrite up to several mm, and small, subhedral Muscovite. The entire cluster has a Quartz crystal as a core. The only blemishes on the piece are small areas of contact, possibly from Muscovite. The overall geometry, balance, and aesthetics are very good, as you can see. For the size, it is among the best I have seen in terms of quality.
Atacocha mine,Cerro de Pasco, Pasco department, Peru
Cabinet, 13.9 x 11.5 x 5.0 cm
From the mines of Peru we have a very good, representative combination piece. The matrix is predominantly intergrown, crystalline Tennantite, and it is draped with Sphalerites and decorative Manganoan Calcites. The Calcites themselves are adorned with hundreds of lustrous Pyrite pyritohedrons. The light pink Calcite crystals are about 2 mm in size and they number in the thousands as they cover half the specimen in ridges and mounds. Of course, the Manganoan Calcite has a rich orange-pink fluorescence. This cabinet specimen is in excellent condition, and the balance and aesthetics are very good.
Nanisivik Mine, Nanisivik, Baffin Island, Nunavut Territory, Canada
Small Cabinet, 11.5 x 8.0 x 7.2 cm
A very rare , QUALITY, AESTHETIC cluster of undamaged, lustrous, brassy Pyrite blades that are pseudomorphed after Marcasite crystals. Some of these blades reach up to 4 cm across, and they uniformly have an excellent metallic luster. The surfaces of the pseudomorphs have fine parallel faces, almost strip-like, and some even create the appearance of an orthogonal, woven pattern. The Nanisivik Iron Mine on Baffin Island, Canada, north of the Arctic Circle, is famous for these crystals, among other specimens. This excellent, aesthetic piece has multiple display possibilities, and is much better in person, even. These are 20 years old now - they had to helicopter these out ! I saw them come out through a few mine geologists in the 1990s, and few good specimens had this kind of size or presence to them. This is one of the best I know of.
Huanzala Mine, Huallanca District, Huanuco Department, Peru
Small Cabinet, 6.2 x 4.1 x 3.8 cm
This small cabinet Pyrite specimen is composed of bright and lustrous and octahedrons. Just over 3 cm on edge, these octahedrons have attractive, cut-glass-like cubic modifications on each of the corners. Interestingly, the only faces that are striated are these modified corners. I have always found preferential effects to be fascinating, and these are attractive as well! If you are not jaded about Pyrites, you have to admit how eye-catching Pyrites can be!
Main Stope, Sweet Home Mine, Mount Bross, Park Co., Colorado, USA
Cabinet, 12 x 5.6 x 1.5 cm
The Sweet Home mine is famous for its Rhodochrosite specimens, but it has produced some very fine Fluorites, as well. This Cabinet specimen is dominated by at least a hundred eye-catching, sky-blue Fluorite cubes that average 2-3 mm in size. Many are perched on the frosted, sharp Quartz needles, creating a dramatic combination. These Fluorites are actually gemmy and zoned, with faces that are frosted to translucent. There are some Pyrite crystals tucked down amidst the Quartz, as well as some other sulfides, possibly Tetrahedrite among them. This is a choice, inviting association specimen from the mine that produced the world's finest Rhodochrosites. Rare!
Pachapaqui District, Bolognesi Province, Ancash Department, Peru
Large Cabinet, 16.1 x 9 x 5 cm
Fine, highly representative combination piece from Peru, specifically the Pachapaqui District. The initial plate of lustrous, striated Pyrites was generously ringed by sharp, translucent to gemmy Sphalerite crystals (up to 1.9 cm), along with Galena cubes. The final generation is hundreds upon hundreds of 3-4 mm of complex, light pink Manganoan Calcite crystals. One side of the piece is completely covered, while the presentation side has the many Calcites placed decoratively on and around the sulfides. As expected, the Manganoan Calcites fluoresce a brilliant orange. There are a number of cleaves on the Sphalerites from contacting, but by their very nature they blend in well, and the overall good aesthetics of this piece are not really affected.
Vitreous to resinous, orange-brown, pseudo-cubic crystals of jeanbandyite associated with frosted, white, subhedral to euhedral crystals and aggregates of crandallite with very local, rare, yellowish wickmanite crystals. The matrix consists of vuggy stannite with minor pyrite. LA County Natural History Museum (indicating Mark Chance Bandy collection) and A. F. Eadie Minerals labels add significance.
Extremely rare! This piece represents the largest of only 5 known specimens from the type locality!! Platey, hexagonal, intergrown crystals of nukundamite occur in small vugs. The sawn surface shows nukundamite veinlets and disseminated pyrite. A really excellent miniature of this extremely rare mineral. Richard Kosnar collection label.
Julcani District, Angaraes Province, Huancavelica Department, Peru
Small Cabinet, 8 x 4.5 x 4.5 cm
Visually scintillating combination piece from the well-known Julcani District in Peru. The blades of Enargite are significant in size - the largest being 5 cm long - almost unheard of for here. These blades are coated or partially replaced by lustrous, drusy Pyrite. Centered among the Enargites, rising like a Phoenix, is a brilliant, highly modified Pyrite pyritohedron. The luster on this crystal is superb, and the growth is so differential that one part rises well above the others, looking almost like an elongated spinel twin (but not). The Enargites are superb, and they are so enhanced by the dazzling Pyrite. For something so seemingly simple, I find the aesthetics of this small cabinet to be enthralling. In person, with the geometry and the sparkle and metallic shine, it is really just incredible and leaps out at the viewer. One of my favorites in this collection!
This is the largest crystal of Pyrite from New Guinea that I have seen. The large, 5 cm cubic Pyrite has very good luster and a bright, golden color. The edges are beveled, and although there is a small amount of edge wear, the specimen overall is nonetheless exceptional for the locality and attractive for a pyrite by any standard. Former DeNatura specimen.
Merelani Hills, Lelatema Mts, Arusha Region, Tanzania
Miniature, 3.4 x 3.2 x 2.6 cm
Tsavorite and the gem green garnets from this mine are generally regarded as the world's best, in their size range. This impressively large Tsavorite Garnet crystal, measuring a full 3.4 cm across, blows the viewer away from across a room. It has COLOR and an amazing, glassy luster that together are rarely seen. This size for a Tsavorite is certainly uncommon, and the crystal glows a brilliant forest green color with no need for backlighting. The Tsavorite is gemmy throughout, although with some fracturing in the lower half and the upper half. A contact is present on the back, but it is otherwise complete. The presentation face is pristine and so perfectly smooth that it looks polished. Whether you approach this as a fine gem specimen or as a potential gem rough (heaven forbid), there is no denying the quality and aesthetics. Better in person, even, as the camera cannot capture the luster. 158 carats (about 33 grams).
This Pyrite, from the great Sweet Home Mine, is amazing no matter where it is from. It is composed of bright, golden striated cubes intergrown with Tetrahedrite and Quartz. The largest Pyrite cube is 2.1 cm, and the Tetrahedrite crystals range up to several mm and the Quartz crystals up to about 7 mm. At the time of the mining of the Rhodochrosite, other species were only seldom encountered, so many collectors in the mid-1990s snapped up specimens with Pyrites, Fluorites, and Tetrahedrites. They remain coveted, as are the Rhodos from there. A "Toenail" in size.
Covellite is considered one of the 'holy grails' by Italian collectors. This one is a matrix piece of this rare old classic! This excellent cabinet piece is defined by very sharp blades of Covellite, reaching almost 3 cm in size. These are embellished by a profusion of Pyrite crystals coating about half of the Covellite blades and others on the back side as a bonus. Some of the Covellites have the brilliant blue and purple that is so sought after. With cleaning, the piece can of course be made much brighter, but it has a nice antique patina on it now that I have chosen to leave. It displays well from several angles, with the freestanding covellite blades either atop or at bottom. On balance, the pics speak for themselves - this is a fine, interesting, and aesthetic specimen. Most others I have seen are off-matrix clusters, whereas this has a wonderful solid matrix of sparkling pyrite to set off the crystals.
Falcacci stope, Rio Marina, Elba Island, Tuscany, Italy
Small Cabinet, 6.3 x 4 x 3.4 cm
Elba Pyrites are renowned for their attractiveness and size. This complex small cab is a mix of forms, creating an elongated crystal with several areas of fine, attractive striations. These areas add a lot of character and aesthetics to the crystal. There are two areas of contact, but they really do not detract from the overall aesthetics. A very unique Pyrite from a famous locality.
Sub-Rosiclare Level, Annabel Lee mine, Harris Creek District, Illinois, USA
Small Cabinet, 8.3 x 7.3 x 3.2 cm
Outstanding Galena specimen from the Annabel Lee Mine, where sharp galena is unusual. The lustrous Galenas are sharp, lustrous, and they have attractively modified corners. The largest is 2.3 cm on edge. They rest on a bed of blue Fluorites, themselves resting on matrix. The Fluorites are silky up to 8 mm on edge, and are sprinkled with flashy Pyrites up to 1 mm. Around the edge of the matrix are Ruby Jack Sphalerites, and if you flip the specimen over, the reverse side is covered by lustrous and gemmy Sphalerites. To add even more interest, there is a band of light blue Fluorites that winds its way across the Sphalerites. Mined in 1986, this piece was found in a pocket that was 12' x 3' x 3'! Very fine aesthetics. RCL 1869
Merelani Hills, Lelatema Mts, Simanjiro District, Manyara Region, Tanzania
Cabinet, 12.5 x 8.5 x 5.2 cm
Pyrite from Merelani's tanzanite mines is now setting precedent as some of the world's best. This complex crystal habit, phenomenal luster, and size really give them impact. However, this piece has luster beyond any that I have yet seen - frighteningly bright, radiant metallic luster combined with a brightness that acts like a mirror when light hits certain angles. It looks like it has been plated in 24-karat gold. The crystal cluster is complete all around save for a trivial contact and a few absolutely trivial dings. It is 3-dimensional and hefty (1000 grams mass!) Minor graphite is associated at the base. This piece is simply stunning - it leaps out when on display and stands way above any merely representative status as a locality piece. Joe Budd photos.
Spruce Claim pyrites are the finest in the USA, and among the finest in the world when at their best. Rarely do we get them with great aesthetics and no damage, though, due to the high altitude and remote location. It is a great story, how these are collected after being dropped off by helicopter - see the book, American Mineral Treasures. Among many that were found, and it is few enough each year in the short mining season, this piece is spectacular for the sharpness and unusual habit of the pyrite and its central and aesthetic perch amidst quartz. The complex pyrite crystal measures 3 cm tall and is so lustrous and reflective that you can see your face in it like a mirror. It is undamaged, though on close glance there seem to be three teeny tiny divots in the crystal face that must be slight growth interruptions or contacts, but do not seem to be breaks. The piece overall is 360 degrees, sparkly, and displays dramatically without excess mass. Joe Budd photos.
Bethel Level, North End, Annabel Lee mine, Harris Creek District, Illinois, USA
Small Cabinet, 9 x 8 x 6 cm
This is a highly unusual specimen for several reasons! It is, most obviously, a notable, gemmy yellow Fluorite from the Annabel Lee Mine where this is the rarest color to obtain in saturated hue and with luster. The Fluorite is predominantly yellow, with an outer zone of light blue highlighted by another, narrow purple band around it. This emphasizes the yellow color, all the more. The main crystal is an impressive 6.5 cm, and the Fluorite has very good luster, gemminess, and color. There are numerous 1 mm-size Pyrites on the Fluorite, as well a dozen or so little Calcites on one face. The pyrite association is not only exceptionally rare, but also is beautiful. You almost never see such a contrast, from Illinois, and this piece is especially attractive (and sparkly!) for this reason. Interestingly, there is a highly fluorescent layer of Fluorite between the yellow and the blue. Any way you look at it, the effect is phenomenal. There is one small and lesser corner on the lesser of the crystals of the presentation face that is dinged, but otherwise the presentation side is in very good condition and the major crystal itself is almost entirely pristine. Even better and brighter in person, as it is hard to photo.
Bethel Level, North End, Annabel Lee mine, Harris Creek District, Illinois, USA
Cabinet, 10.4 x 7.5 x 6 cm
Glimmering, very attractive cabinet specimen with hundreds of Pyrite crystals, accompanied by a few Barites, populating a Calcite matrix. The Pyrites, a beautiful iridescent brick-red, have superb luster and range up to about 3-4 mm. The gemmy Barite blades are in a single cluster and are about 8 mm. The overall aesthetics of this piece are excellent, and the Pyrites most unusual and eye-catching. Even better in person! Ross Lillie notes on his label that the barite style dates the specimen to about 1985.
Miller's Ridge Area, Rosiclare Level, Annabel Lee Mine, Hardin County, Illinois, USA
Large Cabinet, 14.5 x 10.5 x 5 cm
This is of course a classic style of gemmy purple phantomed fluorite, for the location, but rarely seen in such a nicely trimmed-out specimen with a dominant crystal. Usually, you get little crystals in flattish plates. This is an appealing, large cluster of purple to blue Fluorite, accented with small Pyrite crystals for extra sparkle. The finely stepped faces have very good luster, and the largest of the crystals (5.2 cm) clearly show five color zones of phantoms within. That major, dominating crystal is RAZOR sharp. Despite the size of the specimen, it is nearly complete all around, and with only a small amount of edge wear in two spots. I have seen literally thousands of Illinois fluorites and this particular style, although classic and common in principle is just so hard to find in an exceptional cabinet piece. The sharp phantoms, the dominant single gem crystal among the rest, the rich color, and the accent of pyrite all combine to make this one "a notch higher" than the norm. All photos are shot with normal lighting, with a bit of backlighting, the phantoms will show even more dramatically. RCL 822
Covellite is considered one of the 'holy grails' by Italian collectors, and the Calabona mine produced very few of them in its historical mining (1850-1900). These blades range up to 3 cm across, and they have a muted metallic luster and iridescence due to alteration to Djurleite (which produces a black surface with minute sparkles that are not coming through in the photos). The replacement is unusual. There is associated Djurleite ps. Pyrite, along with Pyrite and Chalcopyrite. To quote a previous owner, "A picture of this specimen was published by Revista Mineralogica Italiana (2009), vol 2, as one of the best minerals at the 2008 Turin exhibition." It is very 3-dimensional, and is better in person. This is a piece from the noted Bonisoli collection in Italy.
Falcacci stope, Rio Marina, Elba Island, Tuscany, Italy
Miniature, 4.1 x 3.3 x 2.1 cm
Choice set of three sharp, lustrous octahedra (think the Great Pyramids) of Pyrite from Elba Island. The Pyrites line up very nicely, and the largest is 1 cm on edge. The matrix is hard clay, which is typical for the Falcacci stope of Rio Marina. Really elegant in its simplicity and a rare habit for Elba.
Jinguashi Mine (Chinkuashih Mine), Ruifang, New Taipei City, Taiwan
Cabinet, 13.0 x 10.3 x 3.7 cm
Wormlike elongated clusters of splendent, brassy yellow pyrite totally cover a matrix of crystallized enargite, here. In some cases the pyrite clusters are at right angles to each other, standing out nicely and giving this a very 3-dimensional surface. In general, fine mineral specimens from Taiwan are uncommon and this is an extremely showy piece from a classic mine (now defunct). Ex Eugene Sensel collection, from David New in 1975
Huanzala Mine, Huallanca District, Dos de Mayo Prov., Huanuco Dept., Peru
Small Cabinet, 7.1 x 6.4 x 3.7 cm
This is a completely unique specimen which I bought around 2001-2002 from an emailed photo by a supplier (and sold, and recently re-acquired). I have never seen another like it, since. The colors are fantastic! In person, they shimmer and change in lighting, and show multiple hues of rainbow iridescence. Joe Budd photos.
At the time of the mining of the Rhodochrosite from this now-closed mine, other species were only seldom encountered. Many collectors at the time, in the mid-1990s, snapped up pyrite and tetrahedrite and the rare apatite when found. This was a piece I bought back in the mid-1990s and sold at that time. It is a brilliant, lustrous plate with sharp 1 cm pyrites on quartz, and a tiny decoration by a small rhodochrosite crystal. Rare for the locality, in this quality and size of specimen. Joe Budd photos.
Pyrites are uncommon from Panasqueira, and this impressive specimen is actually amazing for the locality. The surface display shows off two generations of Pyrite, with the second larger generation having intergrown crystals to 2 cm on edge and covering a rolling carpet of smaller crystals. The pyrites rest on an Aresenopyrite matrix, and there is an Apatite added on top as a bonus. Good Pyrites from Panasqueira should be as treasured as any other species from this important locality, and this one will add to the breadth of any Panasqueira collection. Much better, even, in person, because the luster and sheer metallic flash of the piece is hard to capture.
This large, very attractive Fluorite is absolutely classic for Cave-in-Rock! The Fluorites have yellow cores with gemmy outer zones with sharp phantoms that range from purple to blue. The corners have stepped growth and the cubic faces are dotted with lustrous, mm-sized Pyrite crystals for decoration. There is some very minor edge wear, but it really has little effect on the overall appearance given the size and showiness of the piece. The largest crystal is over 6 cm on edge, and in some areas the "zoning within zoning" layering is simply amazing. An excellent, aesthetic cabinet specimen, it is even better in person if you have backlighting in your case, as it is shown here with rather normal overhead lighting.
This is from a famous fossil deposit of 300-million-year-old Ammonites along the Volga River in Russia (Jurassic Callovian Stage-161 million years ago). After burial, the original ammonite shell material was partially converted by mineralizing fluids rich in iron and sulfur into pyrite. The sliced fossil now reveals an awesome view of living chambers of the ammonite coated with splendent brassy yellow pyrite. each piece is approx., 6.3 x 5.1 x 1.0 cm, almost similarly sized. This ammonite is Quenstedticeras species. While I do not deal in a lot of fossils per se, I have seen these over the years and this particular set was, to my eye, just incredibly appealing as a dual fossil and mineral specimen with its high quality pyritization and aesthetic balance.
This deposit has produced thousands of pyrite specimens but, not many as nice as this piece which is outstanding. A single, equant, bright metallic cube of pyrite measuring precisely 1 inch square sits perched on matrix (possibly stabilized or repaired after coming off in preparation as are most such specimens). This IS from top percentile material for the finds.
Toenail – A “gut feeling” but often overlaps between a large thumbnail and a small miniature
Miniature – Maximum 5.0 cm
Small Cabinet – Maximum 9.4 cm
Cabinet – Maximum 18.0 cm
Large Cabinet – Over 18.0 cm
Using the Search Form
All specimens for sale on the web site are entered into a
database. The search form allows you to specify criterea
to select the specimens you wish to view.
The form has a set of fields for you to fill in. You may fill in one
or more of the fields. If you fill in more than one, then only
specimens satisfying all fields will be returned. (Empty
fields match all specimens).
For the type-in text fields, the value you type in is matched
against the values in the field for each specimen in the database.
Since it's a pattern match, it's ok to type in partial
values. For example, when searching localities, if you simply
enter "China", you'll select all speciments from anywhere in
China. If you type in "Colorado, USA", you'll get all
specimens from the state of Colorado in the United States.
You can limit the search to specimens that were added during
some interval or prior to that interval. For example, selecting
"Before" and "10 Days" will search specimens added prior to the
last 10 days. Selecting "Since" and "10 Days" will search specimens
added during the last 10 days.
Each specimen has a unique alphanumeric ID, for example,
"CK42", or "URI-01". You can limit the search for specimens whose IDs contain a given
string of characters by specifying it here. You can indicate if
you would like "Partial Matches". For example "K-112" would match
"K-112" and "HECK-112". Or you can uncheck the "Partial Matches"
box to only retrieve exact matches.
Each specimen has a name field. Often the name is just the name
of the primary mineral(s) of the specimen. But in some cases,
there are conventions that can be useful in finding what you are
looking for. For example, all pseudomorph specimens will
the string "after" in their names, so you can find all pseudomorphs
by entering "after" in the Name field. Be aware that the name
field might include variety names ("amethyst", "aquamarine", etc.).
Thus, to be sure of finding all Beryl specimens, select Beryl in the
Mineral field - not in the Name field.
The Species field is different from the Name field, in that it searches
the list of species occurances noted for each specimen. (Not the
species names that happen to be in the specimen name!) It is more
precise than searching for species names in the Name field. For
example, if you search for just "A" in the Name field, you will find
Albites, Amazonites, Azurites, and so on... if you search for
specimens by specifying a Species in the Species
drop-down menu, the only specimens noting a occurance of that species
will be selected. The Species field allows IMA-approved species names,
only. (E.g., you'll find Quartz, but not Amethyst).
The locality field is populated with locality names. Spellings and the
locality hierarchy are generally as presented in the locality listings
Of course, you can also search by any part of the locality name,
for example, "Sweet Home Mine" would find all specimens from a
The Description field seaches in the specimen descriptions.
Since previous owners are usually named in the description,
you can search for "Arthur Montgomery" to look for specimens
sold by the noted American mineralogist (or perhaps even from
Montgomery's personal collection).
Allows you to search based on the specimen sizes.
By filling in these fields, you can limit the search to a particular
price range. For example, with "Min Price" 1000 and "Max Price" of 2000,
the search will only match specimens in this price range.
Allows you to constrain the search to specimens formerly in the collection
of one of the listed collectors or institutions.
Searches are "bookmarkable". After clicking "Search", and
receiving results, you can bookmark the result page, and
your bookmark will store the search. Remember, revisiting the
bookmark will re-execute the search; it does not store
the search results. If the contents of the database have changed
since the search was originally stored, the results
THE ARKENSTONE has been a leading crystal and fine mineral specimen dealer with a variety of common and rare minerals for sale online and in our galleries in Dallas, Texas and Shanghai, China. Visit iRocks.com to learn about fine minerals and explore natural fine mineral specimens, crystals, and gemstones. Get in touch to schedule a private gallery visit or ask how to sell mineral collections.
PO Box 830460 | Richardson, TX 75083 | (972) 437-2492 | info@iRocks.com