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Mineral Specimens with Quartz
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6.7 x 5.7 x 5.1 cm. This well-trimmed, balanced matrix hosts a 4.7 x 2.1 x 2 cm crystal of radiantly purple amethyst. It is more uniformly purple, more robust, and more glassy in lustre than most material from this locality and to me is a very special quality because of this combination of superlatives. It is razor-sharp, without a ding on it. Bob Whitmore obtained it in exchange some years ago. Ex. Robert Whitmore Collection.
7.2 x 5.2 x 4.7 cm. Palermoite is a very rare phosphate, first found in 1952 at this type locality for the species. To date, it has been found at just a few other locales, and still these crystals are the best. This particularly rich specimen is one of the larger, richer specimens with display aesthetics overall, according to Bob Whitmore. It has hundreds of palermoite crystals, many still covered by pocket clay just the way he found it. The top portion has been cleaned a bit, to reveal sharp crystals to 4mm nicely contrasted on lustrous, dark smoky quartz. Ex. Robert Whitmore Collection.
9.8 x 6.3 x 4.7 cm. A vivid, gemmy, blue, 3.3 x 1.3 x 0.9 cm aquamarine is here perched in massive quartz matrix. This specimen is a beautiful piece of extremely high quality for a Maine aquamarine – since most from this region are opaque or pale, or both. Here, however, is a piece with areas so gemmy you can cut stones out of, and it is a terminated crystal no less. This specimen was collected by Cliff Trebilcock in 1995 and sold to Robert Whitmore in 2001. Ex. Robert Whitmore and CLiff Trebilcock Collections.
6.9 x 6.0 x 2.3 cm. Like a flame leaping off its campfire in blowing wind, this dramatic 5-cm-long cluster of gold crystals seems to bend and blow over to the right, looking as if it is really about to move. It is a very visual specimen. The gold is composed of intricately interlocking crystals in a variety of habits. It is complete on both sides although more gold shows at the bottom portion, from the front. The back is free-standing and clean. Ex. Robert Whitmore Collection.
4.1 x 3.4 x 2.5 cm. This is an approximately 3.5-cm-long elbow-twinned rutile from what, to me, must be the most amazing find for the species since Graves Mountain heyday. These came out in the late 1990s in one small batch, and are now rarely available. This lustrous, super-sharp rutile crystal is dramatically perched on matrix of crystallized quartz, exposed on all sides. It is perfect all around except for a few very minor contacts in the back side. Ex. Robert Whitmore Collection.
4.5 x 2.5 x 2 cm. An outstanding example of the sceptered quartz that rarely come from this locality in such large size, and fine symmetry. Most are smaller, or off-centered. This is a truly superb miniature, complete and perfect all-around. It has an unusually sharp phantom inside , as well. Ex. Robert Whitmore Collection.
5.4 x 4.7 x 2.8 cm. This miniatures size specimen is loaded with dozens of superb, sharp, lustrous, pyramidal crystals of Quartz that are included with Hematite/iron oxide to produce some of the most intense red Quartz crystals I've seen from Bolivia. I'm sorry I don't have a more specific locality for this material, but unfortunately that can be the nature of the beast with Bolivian minerals. I know the piece is indeed Bolivian in origin. It was purchased by Brian Kosnar directly from the miner who collected them while Brian was on a buying trip in Bolivia.
9.3 x 5.8 x 3.3 cm. The Sweet Home mine is famous for its Rhodochrosite specimens, but it has produced some very nice Fluorites as well. Richard Kosnar mined the Sweet Home for a few years during the late 1970's and managed to collect some excellent Rhodochrosite specimens. It hosts a few gemmy, purple (blue in sunlight), cubic crystals of Fluorite measuring up to 3 mm with good sharpness and luster. The Fluorites sit atop a matrix comprised of Tetrahedrite, Sphalerite, Quartz and Hübnerite. A nice association specimen from the mine that produced the world's finest quality Rhodochrosites. Despite the smaller size, this is a good quality Fluorite from the Sweet Home. This piece is from one of the early pockets that Rich Kosnar opened when he started mining in 1977. Ex. Richard Kosnar Collection.
2.7 x 1.7 x 1.2 cm. One of the lesser known, yet important localities for Rhodochrosite in Colorado is the Climax Mine. This mine is actually a Molybdenum mine with a very large open pit and some underground tunnels. This specimen hosts a few gem-quality, sharp, lustrous, colorless "needle" Quartz crystals with a few sharp, translucent, red/pink rhombohedra of Rhodochrosite perched directly in the center. A very aesthetic specimen from this classic Colorado locality. Ex. Richard Kosnar Collection.
4.4 x 2.4 x 1.0 cm. This is a very rich and superb specimen of a rare phosphate from a world-famous locality. Zanazziite is a Hydrated Calcium Magnesium Iron Aluminum Beryllium Phosphate. This piece hosts relatively large, sharp, well-formed, translucent, olive-green to nearly black crystal groups of the rare phosphate Zanazziite which are sitting on crystallized Rose Quartz. There are more Zanazziite aggregates on this piece than virtually any other piece I have seen, and the contrast against the pink Rose Quartz makes this a very attractive specimen of an extremely hard to find mineral species. This specimen is over 30 years old and is from the original find from the 1970's. Ex. Richard Kosnar Collection.
2.8 x 2.2 x 1.4 cm. A rare and superb color-zoned fluorite cube on quartz thumbnail from the Blanchard Mine and the Jaime Bird Collection. The fine, lightly frosted cube has a unique red center (I have never seen another like it from here) to go along with the shades of yellow, blue and purple. And the pristine fluorite cube is beautifully set on a matrix of small quartz crystals. Very fine and uncommon material from the Jaime Bird Collection.
5.3 x 1.4 x 0.9 cm (largest). An excellent 3-piece set of quartz crystals from Namibia. The two, tall, tabular crystals are glassy, water-clear and have interesting zoning of amethyst, smoky and colorless quartz. The shorter, stout crystal is doubly terminated, water-clear with frosted termination faces and has unusual inclusions of goethite or hematite. All three crystals are pristine.
7.0 x 4.8 x 4.0 cm. An unusual, rare and excellent Colorado pseudomorph. These specimens have been labeled as being quartz after baryte pseudomorphs, but given the fact that baryte is chemically inert and nearly impossible to dissolve, it is most likely that these pseudomorphs are quartz replacing anhydrite. With that said, this superb plate consists of textbook pseudomorphs showing the perfect orthorhombic, thin bladed form of the previous crystal which was replaced by very small, almost "sugary" white quartz crystals. Ex. Stoudt Collection.
15.5 x 12.0 x 6.5 cm. A fine, large cabinet combination specimen from recent finds at Jalgaon. The typical curved basalt vug is prominently highlighted by a superb, 6.0 cm high, very glassy, prismatic, green to colorless apophyllite crystal with a sharp pyramidal termination. The roof of the vug holds a 2.5 cm, glassy and lustrous, bladed rosette of colorless epistilbite crystals as a fine accent to the vug lining of flesh-colored, popcorn-style, drusy quartz. Epistilbite is much less common than stilbite in India.
11.5 x 11.5 x 9.5 cm. Rhodochrosite from the 1970s - early 1980s finds at the Huayllapon Mine at Pasto Bueno has always been highly desirable and very seldom available in large specimens. This excellent cabinet specimen features a very well-placed 8.5 cm wide vug richly and attractively lined with pinkish-red rhodochrosite rhombs to 7 mm and quartz crystals to 2.5 cm long. Many of the rhodochrosites are water-clear gems and the quartz crystals grade from water-clear to milky. A large, highly representative example of the species and locale.
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Rob Lavinsky, rob@irocks.com
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share specimen![Quartz (Var: Amethyst) from Mun. Las Vigas de RamÃrez (Mun. de Profesor Rafael RamÃrez), Veracruz, Mexico [db_pics/mdpics/MD-250932a.jpg]](db_pics/mdpics/MD-250932a.jpg)
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