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Mineral Specimens with Quartz
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This is a really unusual specimen. A crystal of calcite is perched atop, or impaled by, a stalactite of colorless quartz upon which, are several small lemony-yellow botryoidal fluorite spheres. Encrusted around the calcite core atop the pedestal are rhombs of calcite, to 3 cm across. As some of the calcite seems to hav ealtered to quartz at the surface, it appears that there has been at least, partial replacement(pseudomorphism) of the whole specimen by a later generation of quartz. UNUSUAL! this piece is pristine and complete all around, too
A 4 cm across botryoidal, grayish-lemon color, fluorite sits on a quartz druse. It is translucent with a muted luster. It is slightly contacted on the bottom side, but that is of little consequence. It is cheap because it has poor lustre, but it is still a great example of this rare habit in fluorite
You want a unique Indian calcite??? This is as unique as it gets; a self standing rocketship! From a pedestal of golden calcite around which grew a layer of colorless, drusy quartz, perches an angled, doubly terminated scalenohedron. The color is fascinating, with gemmy, transparent golden calcite accented by the overgrowth of dark brown-black calcite which the calcite crystal later developed on preferential faces. The calcite measures a full 8 cm from tip to tip and has good luster. This is all topped off by a cute accent: a colorless, doubly terminated, stilbite crystal. The stilbite is 1.5 cm across. I HAVE NOT not seen another specimen like it. This is really too "cool" for more words! 2 sides and a down-view are shown.
A 3-cm-across, light lemon color, botryoid of fluorite rests on a druse of colorless quartz crystals which, in turn, have formed on an amygdaloidal basalt matrix. The botryoidal fluorite from India is arguably the best in the world for its type and this is a truly outstanding example with good, uniform color and excellent translucency. It is set against contrasting matrix that really makes the piece!
ex. Eric Asselborn
These crystals are very sharp for English bornite, and reach in size to 2.0 cm across. They are perched on a translucent shard of crystallized, colorless quartz xls to 1.0 cm are several crystals of metallic gray, lustrous, pseudocubic crystals of bornite. The isolation of the bornite is highly unusual and aesthetic. While the specific mine name has been lost to history, this specimen is from the collection of Dr. Eric Asselborn, owner of one of Europe’s finest collections. This came from a trade with the BMNH and that he had been told "Carn brea" at the time (as a general area, rather than the specific mine).
Sharp, golden, 2-cm crystals in a spray perched atop a knoll of quartz! This is old classic material, from the heyday of the Herodsfoot Mine!
Cute specimen with sharp spherical prehnite clusters on sparkling quartz!
A rather unusual large plate of bournonite crystals, all showing sharp UNTWINNED crystals to 2.25 cm in size. This is actually more uncommon, compared to the twinne dform of the mineral. The crystals form this locality are sharp and gun-metal lustrous, making for very dramatic bournonites. The matrix contrasts a bit more in person than it appears, and is coated with sparkly druse of other sulfides such as pyrite. This is a rich, large, unrepaired piece of high quality from the amazing finds here of several years ago.
ex. Martin Zinn
This extremely elegant combination specimen is one of just a very few of such quality to have come out about 5 years ago. It is complete all around and really just dramatic as heck. The color of the purple apatites (which are to almost 1 cm in size) leaps out at you - they could pass for Maine apatite, easy. At the time, these went for very high prices and I remember some I didn't like as much at higher prices, so I think that this is, relatively, a good deal.
This is an approximately 1-inch, 3-dimensional, lustrous, super-sharp rutile crystal perched on matrix! It is a real prize for the size, because of the crystal quality and its balance on matrix. These came out in the late 90s in one small batch, and seem to have gone the way of the dodo since. Haven't seen one this nice in awhile.
A sharp, lustrous, glassy 1.5cm barrel-like crystal perched on the side of a complete quartz point - unique! This looks like apatite, it is so sharply hexagonal and gemmy and lustrous - it is a very surprising occurrence for goshenite
This gorgeous, well-balanced miniature features large and gemmy crystals to an inch, perched nicely on matrix. The large crystal has GLASSY lustre and is super-translucent, with a rich cherry color! It is somewhat better in person as it was photographed at a slightly odd angle to get everythign to show up better and lit well. It has no repairs. This is one of the better rhodo mini's I have seen on the market recently. They are REALLY drying up fast. I sell very few not because I do not have them, but because I tend to stash them. These are like money in the bank, going up 20% per year or MORE recently. These are the fastest-appreciating items in the mineral business
ex. Sam Nasser
The best thumbnail example of this material I have ever seen! Complete and perfect all around!
Sharp disc-shaped rhodies, perched dramatically and beautifully on bright and lustrous quartz!
This is a stellar miniature, far beyond the "reference example" category for the species, featuring unusually thick and stout crystals of this exceptionally rare silver telluride species. This locality is recognized to have produced best of species, but over 150 years ago now! SHARP crystals to 1 cm adorn the top of this knoll of quartz matrix. It is as good as you can reasonably expect to find at a reasonable price point, and also fairly displayable.
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Rob Lavinsky, rob@irocks.com
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share specimen![Quartz replacing Calcite, on Quartz stalactite with Fluorite from Mahodari, Nasik, Maharashtra, India [db_pics/pics/cmi18a.jpg]](db_pics/pics/cmi18a.jpg)
![Quartz replacing Calcite, on Quartz stalactite with Fluorite from Mahodari, Nasik, Maharashtra, India [db_pics/pics/cmi18b.jpg]](db_pics/pics/cmi18b.jpg)
![Quartz replacing Calcite, on Quartz stalactite with Fluorite from Mahodari, Nasik, Maharashtra, India [db_pics/pics/cmi18c.jpg]](db_pics/pics/cmi18c.jpg)
![Fluorite on Quartz from Jalgaon, Maharashtra, India [db_pics/pics/cmi24a.jpg]](db_pics/pics/cmi24a.jpg)
![Calcite on Calcite, on Calcite over Drusy Quartz from Nasik, Maharashtra, India [db_pics/pics/cmi6a.jpg]](db_pics/pics/cmi6a.jpg)
![Calcite on Calcite, on Calcite over Drusy Quartz from Nasik, Maharashtra, India [db_pics/pics/cmi6b.jpg]](db_pics/pics/cmi6b.jpg)
![Calcite on Calcite, on Calcite over Drusy Quartz from Nasik, Maharashtra, India [db_pics/pics/cmi6c.jpg]](db_pics/pics/cmi6c.jpg)
![Fluorite on Quartz from Mahodari, Nasik, Maharashtra, India [db_pics/pics/cmi8a.jpg]](db_pics/pics/cmi8a.jpg)
![Fluorite on Quartz from Mahodari, Nasik, Maharashtra, India [db_pics/pics/cmi8b.jpg]](db_pics/pics/cmi8b.jpg)
![Bornite on Quartz from Carn Brea, Ilogan, Cornwall, England [db_pics/pics/corn03a.jpg]](db_pics/pics/corn03a.jpg)
![Bornite on Quartz from Carn Brea, Ilogan, Cornwall, England [db_pics/pics/corn03b.jpg]](db_pics/pics/corn03b.jpg)
![Bornite on Quartz from Carn Brea, Ilogan, Cornwall, England [db_pics/pics/corn03c.jpg]](db_pics/pics/corn03c.jpg)
![Chalcopyrite and Quartz from Herodsfoot Mine, Cornwall, England [db_pics/pics/corn09a.jpg]](db_pics/pics/corn09a.jpg)
![Chalcopyrite and Quartz from Herodsfoot Mine, Cornwall, England [db_pics/pics/corn09b.jpg]](db_pics/pics/corn09b.jpg)
![Prehnite and Quartz from Gan Zhi Zhou Mine, near Meigu, Xichang area, Sichuan, Southwest Region, China [db_pics/pics/d05-100a.jpg]](db_pics/pics/d05-100a.jpg)
![Prehnite and Quartz from Gan Zhi Zhou Mine, near Meigu, Xichang area, Sichuan, Southwest Region, China [db_pics/pics/d05-100b.jpg]](db_pics/pics/d05-100b.jpg)
![Bournonite with Quartz and Pyrite from Mina Machacamarca, near Colavi, Potosi Department, Bolivia [db_pics/pics/d05-131a.jpg]](db_pics/pics/d05-131a.jpg)
![Bournonite with Quartz and Pyrite from Mina Machacamarca, near Colavi, Potosi Department, Bolivia [db_pics/pics/d05-131b.jpg]](db_pics/pics/d05-131b.jpg)
![Bournonite with Quartz and Pyrite from Mina Machacamarca, near Colavi, Potosi Department, Bolivia [db_pics/pics/d05-131c.jpg]](db_pics/pics/d05-131c.jpg)
![Fluorapatite on Quartz (floater) from Lavra do Pederneira, Minas Gerais, Brazil [db_pics/pics/d05-140a.jpg]](db_pics/pics/d05-140a.jpg)
![Fluorapatite on Quartz (floater) from Lavra do Pederneira, Minas Gerais, Brazil [db_pics/pics/d05-140b.jpg]](db_pics/pics/d05-140b.jpg)
![Fluorapatite on Quartz (floater) from Lavra do Pederneira, Minas Gerais, Brazil [db_pics/pics/d05-140c.jpg]](db_pics/pics/d05-140c.jpg)
![Rutile with Quartz from Kapudzyk, Azerbaijan [db_pics/pics/d05-142a.jpg]](db_pics/pics/d05-142a.jpg)
![Rutile with Quartz from Kapudzyk, Azerbaijan [db_pics/pics/d05-142b.jpg]](db_pics/pics/d05-142b.jpg)
![Goshenite (Beryl) on Quartz from Erongo Mtns., Namibia [db_pics/pics/d05-20a.jpg]](db_pics/pics/d05-20a.jpg)
![Goshenite (Beryl) on Quartz from Erongo Mtns., Namibia [db_pics/pics/d05-20b.jpg]](db_pics/pics/d05-20b.jpg)
![Goshenite (Beryl) on Quartz from Erongo Mtns., Namibia [db_pics/pics/d05-20c.jpg]](db_pics/pics/d05-20c.jpg)
![Rhodochrosite with Quartz from Sweet Home Mine, Alma, Colorado, USA [db_pics/pics/d05-41a.jpg]](db_pics/pics/d05-41a.jpg)
![Rhodochrosite with Quartz from Sweet Home Mine, Alma, Colorado, USA [db_pics/pics/d05-41b.jpg]](db_pics/pics/d05-41b.jpg)
![Chalcedony on Chrysocolla from Ray Mine, Pinal County, Arizona, USA [db_pics/pics/d05-44a.jpg]](db_pics/pics/d05-44a.jpg)
![Rhodochrosite on Quartz from Liu Bao Mine, Guangxi Province, China [db_pics/pics/d05-52a.jpg]](db_pics/pics/d05-52a.jpg)
![Hessite on Quartz from Botes, Alba County, Romania [db_pics/pics/d05-55a.jpg]](db_pics/pics/d05-55a.jpg)
![Hessite on Quartz from Botes, Alba County, Romania [db_pics/pics/d05-55b.jpg]](db_pics/pics/d05-55b.jpg)