Mineral Specimens with Pyrite

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flu02 - Fluorite with Pyrite inclusions - SOLD
Gibraltar Mine, Naica, Chihuahua, Mexico
small cabinet, 8.6 x 5.1 x 5.0 cm

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A beautiful specimen with a rich pastel green color and TOTAL TRANSPARENCY, combined with unusually high internal glassy brightness...so overall, this sparkles like crazy. The fluorites show stepped growth one upon another, with cubes modified by octohedral faces at the edges for some very reflective bevels. The golden pyrite inclusions add some obvious pizzazz, and make it really interesting an eyecatching, I believe. Pristine, complete all around (contacted only on the bottom), and just a VERY fine Naica fluorite of classic habit!

flu03 - Fluorite with Galena, Quartz, Pyrite inclusions - SOLD
Gibraltar Mine, Naica, Chihuahua, Mexico
miniature, 4.9 x 4.6 x 3.3 cm

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Water-clear, SHARP cuboctohedral flurites perched one upon the other in a delicately balanced cluster upon a short stack of galena crystals! These fluorites are so clear you can look through to the galena inside or at the back. Also, there is a really neat group of floating pyrite crystals inside the large lower fluorite here, showing what appears to be a cast after an earlier crystal of fluorite or galena where the pyrite specks cumulatively retain the outline of a cubic predecessor. VERY NEAT, though subtle.

flu05 - Fluorite with Galena & Pyrite inclusions - SOLD
Gibraltar Mine, Naica, Chihuahua, Mexico
small cabinet, 7.1 x 5.6 x 4.1 cm

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A bright, beautiful piece with bright, beautiful pyrite inclusions galore! The crystals are just stunning in their clarity, color,and gemminess. Sadly, the right side of the crystal tower there is contacted in several places where it grew against something else, now gone; and the crystallization has thus been interrupted or left rough at the split. I do not think it is real damage, but the right side of the display face is thus rough to the touch, even though visually it looks pretty good (as you see!). Hence, the low price for probably the bet pyrite inclusions in fluorite in the lot!

flu23 - Fluorite on Sphalerite with Pyrite inclusions - $ 475
Gibraltar Mine, Naica, Chihuahua, Mexico
miniature, 6.0 x 4.5 x 4.4 cm

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Fluorite on Sphalerite with Pyrite inclusions from Gibraltar Mine, Naica, Chihuahua, Mexico [db_pics/pics/flu23a.jpg]

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Fluorite on Sphalerite with Pyrite inclusions from Gibraltar Mine, Naica, Chihuahua, Mexico [db_pics/pics/flu23b.jpg]

A stunning miniature with a 3.5-cm complex crystal cluster atop. This looks like a mountain rising out of a nest of surrounding trees , I think...the single large and sharp, gemmy, cuboctohedron in the middle just risign above the surrounding minutely crystallized fluorite! All perched on a nice mound of crystallized sphalerite and complete all around.

flu31 - Fluorite with Pyrite inclusions - $ 850
Gibraltar Mine, Naica, Chihuahua, Mexico
small cabinet, 6.3 x 6.2 x 5.6 cm

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A stunning crystal cluster of the deeper green hue from the pocket, perched against a large crystal that is nearly colorless...and both intergrown so complexly that you have to sit and stare to make sure this isn't the same continuous crystal inexplicably changing on us. In person, you can see this is a very 3-dimensional piece. It can be displayed from about 4 different angles to show green on clear or both side by side, as you wish. It is complete all around, save only a contact on the back side and some galena attachments on the back; and totally undamaged.

flu33 - Fluorite with Pyrite inclusions on Sphalerite - $ 2500
Gibraltar Mine, Naica, Chihuahua, Mexico
small cabinet, 8.2 x 7.6 x 4.1 cm

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One of the most striking pieces in this find, that I know of, and one of my favorites of all Naicas I have seen, for the startling gemminess of the crystals which show bright pyrite inclusions floating inside; for the perfection of the display face; and the balanced aesthetics and contrast on bright, jetblack sphalerite matrix. This is a superb specimen by any standard, and shows the "classic" cuboctohedral habit of Naica at its best. The lustre and transparency are top class, by any standard. The pyrites make it, though. Also, pieces like this are VERY distinct form earlier finds which had much more prominent galena association and less of the sphalerite. The rich , killer-quality sphalerite that is more common in this pocket is really quite unusual for Naica in any quantity, and with good fluorite in association.

flu54 - Fluorite with Sphalerite and minor Pyrite - SOLD
Naica, Chihuahua, Mexico
small cabinet, 9.2 x 8.2 x 4.1 cm

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Gemmy, pastel green fluorite crystals to 4.0 cm across are nicely perched on splendent, black crystals of sphalerite to 1.0 cm across with minor brassy pyrite crystals to .2 cm across. The fluorite crystals appear to be cubes modified by octahedral faces. Only the very smallest of peripheral damage/contact exists. This dramatic uprising cluster is VERY impressive in person, and has a bit more color than indicated in the photo. There is a lot of fluorite for the price, on matrix, here.

flu66 - Fluorite with Pyrite - SOLD
Naica, Chihuahua, Mexico
small cabinet, 6.6 x 4.8 x 4.1 cm

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This interlocked cluster of gemmy fluorite crystals has perhaps the most deeply colored green chromophore of any specimen here, so far, in this update. The crystals show stepped growth and all appear to be cubes modified by octahedral faces. They are all GEMMY. The largest crystal is 2.8 cm across. And as a bonus, the specimen also has inclusions of bright pyrite as well as pyrite crystals to 1.0 cm across scattered on the fluorite. A really unique piece! Its good anyhow, but the pyrite makes it that much more.

GH30 - Tourmaline with Pyrite cap - $ 1500
Lavra da Pederneira, Minas Gerais, Brazil
miniature, 5.5 x 2.4 x 1.8 cm

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From a find in 1984, this is a unique tourmaline with PYRITE in association! When do you see that?!The tourmaline is good on its own: It is a VERY impressive gem tourmaline with intense color, as you can see. The pyrite was found covering these, completely, and had to be picked away with small tools. Sometimes bits of tourmaline flake away with the pyrite cap when this is done. I did the work myself and a tiny sliver of the tourm did come off (i repaired it back on to the rear of the termination), but it is completely covered by the pyrite cap in any case...which is loose, and removeable as you wish, as you can see by comparing the top two pics. The pyrite cap itself, that covered the termination, is intact and is removeable so you can take it on and off the tourmie as you wish. A very unusual talking piece, from a single unique pocket!

GHA15 - Pyrite - SOLD
Panasqueira, Portugal
small cabinet, 9.2 x 8.5 x 6.2 cm

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Pyrite from Panasqueira, Portugal [db_pics/pics/gha15a.jpg]

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Pyrite from Panasqueira, Portugal [db_pics/pics/gha15b.jpg]

This impressive specimen is a rare mineral from the locality, though a common species from elsewhere. Good pyrites from Panasqueira should be as trasured as anything else from this important locality, and this one will add to the breadth of any Panasqueira collection

GHA8 - Quartz with Pyrite inclusions and Dolomite - SOLD
Panasqueira, Portugal
cabinet, 19.5 x 7 x 5.7 cm

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This really interesting piece shows clear, vibrant inclusions of pyrite INSIDE of the quartz crystal. (some breach the surface so the could be analyzed). It is an unusually large and elagant quartz piece for the locality by any standard ! The crysat is draped with white dolomite on the top and back.

HECK-011 - Fluorite on Pyrite and Galena - $ 750
Naica, Chihuahua, Mexico
small cabinet, 7.8 x 7.4 x 5.4 cm

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A matrix of drusy pyrite and galena is nearly covered by frosted octahedrons of lustrous and translucent, pastel green fluorite, to 2.5 cm across. In person this is a very 3-dimensional and sparkly piece

HECK-019 - Calcite on Sphalerite and Pyrite - $ 1500 SOLD
Naica, Chihuahua, Mexico
cabinet, 11.4 x 7.2 x 6.4 cm

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This combo specimen has a style and 3-dimensionality that make it unique! A druse of brassy yellow pyrite highlights splendent, black sphalerite crystals, to 1.5 cm across and superb rhombohedrons of frosted, lustrous and translucent, ivory colored calcite to 3.5 cm across. The way the calcites climb this specimen and surmount it is aesthetic and exceptional. Interestingly, the pyrites are , on close inspection, pseudomorphs after pyrrhotite and retain the bladed habit of the previous species. The calcite fluoresces a rich reddish-orange color due to manganese content, as a bonus. A wonderful example of sufides and carbonates!

HECK-025 - Fluorite on Galena with Pyrite ps Pyrrhotite - $ 750
Naica, Chihuahua, Mexico
cabinet, 12.4 x 8.1 x 4.5 cm

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Two, sharp and unusually isolated, pastel green fluorite crystals to 3.75 cm across are aestheically perced high on a galena and pyrite matrix. The fluorites fluoresce a medium lavender color. Interestingly, the pyrites are weird bladed habits�and surely they are pseudomorph replacements of earlier pyrrhotite but now with the pyrite composition, and sparkle and coloration to boot. This is a flashy piece in person, with sparkle off of all three species present.

HECK-038 - Fluorite with Galena and Pyrite - $ 600
Naica, Chihuahua, Mexico
small cabinet, 7.7 x 6.2 x 4.5 cm

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Drusy,splendent, brassy yellow pyrite and intergrown, lustrous galena crystals to 6 mm across host several frosted, lustrous and translucent, apple green fluorite crystals to 3 cm acrosss. Small faces on the fluorite crystals are unfrosted and gemmy, which allow the viewer a look into their internal world and creates contrast within the crystal faces.

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Rob Lavinsky, rob@irocks.com

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