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Mineral Specimens with Quartz
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5.0 x 4.3 x 3.1 cm. An exquisite cluster of all-hoppered galenas to 1.2cm, which reminds me of old Anasazi cliff-cities I have seen in photos.
6.7 x 6.1 x 4 cm. Extremely high lustre, good size, and fine aesthetics make this one of the very best such specimens for the locality, which is near to where the Calaveras axinites were found long ago. Garnet, however, is much rarer and this is thus a significant locality specimen. Ex. Irv Brown Collection.
6.3 x 4.6 x 3.3 cm. Bolivia has probably produced more tin than any other country in the world. The great tin mines at Viloco (sometimes called Araca) have produced some of the most magnificent Cassiterite specimens extant. This particular specimen hosts several superb, sharp, highly lustrous, very bright, black cyclic twinned crystals measuring up to 2.5 cm across with gemmy crystals of Quartz and small tan "discs" of Siderite. A very attractive association specimen from this historic locality.
18.2 x 9.7 x 0.5 cm. One of the finest examples of this classic material that I have seen. The Amethyst Vein in Creede was an amazing area that measured three miles long and produced some incredibly memorable pieces from this famous Silver mining district. This polished slab is a superb piece of the well known "sowbelly" variety of Amethyst/Quartz that was synonymous with this mine. It is actually nothing more than a polished section of the actual vein in the mine. The specimen was mined in the 1960s, and shows beautifully banded layers of white Quartz and purple Amethyst. One of the most impressive features of this specimen is the fact that it is so gemmy when backlit, as the majority of this material is either translucent or opaque. The slab is complete about 95% of the way around, which is remarkable for these pieces. Ex. Brian Kosnar Collection.
2.8 x 2.1 x 1.3 cm. A very hard to find specimen of "Leaf Gold" in massive white Quartz from Blanca Peak in Colorado. This mountain measures 14,345 feet above sea level and is next to Little Bear Peak in the Sierra Blanca Massif. This piece features small, bright "leaves" of Gold flaring out of Quartz matrix. A hard to find reference specimen from a lesser known locality in Colorado. Ex. Richard Kosnar Collection.
4.2 x 2.7 x 2.2 cm. This specimen is over 25 years old and is one of the best miniatures of the material from Rich Kosnar's collection. A very aesthetic, classic and colorful specimen of Eosphorite from this world-famous locality. Lavra da Ilha is a small island in the middle of the Jequitinhonha River, and has produced some incredible phosphate species over the last 40 years. It is also the type locality for several phosphates that were discovered by Richard Kosnar in the 1970s. This piece hosts large, sharp, lustrous, well-formed, translucent, golden-brown crystal groups of Eosphorite which are aesthetically sitting on a matrix pink of gemmy crystallized "Rose Quartz" on a partial crystal of white/grey Quartz. Ex. Richard Kosnar Collection.
12.6 x 7.8 x 7.8 cm. Matrix specimens of Aquamarine are still fairly uncommon in the world, and to find an association piece such as this is uncommon. This specimen hosts a solitary, euhedral, gem quality, water-clear, sky blue color prismatic crystal of Aquamarine measuring 3.4 cm long which is protruding from a matrix comprising, sharp, well-formed, distinct, and lightly frosted crystals of Smoky Quartz which are associated with contrasting snow-white crystals of Albite and minor Muscovite.
17.5 x 13.5 x 9.3 cm. This specimen is a rare large schorl and matrix piece from the mine. As a bonus it has a sharp 1.5 cm Spessartine crystal sitting within the cast of a former, larger crystal, perched on beautiful and large matrix of albite and schorls. For the matrix, itself, this is a classic specimen and you rarely see such in large size. Most larger pieces from here are quite broken up. This is an old piece from Louis Spaulding, the mine owner. Ex. William Larson Collection.
15.0 x 5.4 x 5.3 cm. A very interesting quartz colored pinkish by montmorillonite inclusions, and casted out so it is hollow inside. Classic for the locality, once common and now seldom seen. Ex. William Larson Collection.
9.6 x 8.0 x 7.7 cm. The tourmaline is sharp and lustrous, 5 cm across. It is, typically for the Little Three Mine, very dark and not very colorful. But the overall piece, in combination with a sharp and lustrous quartz (complete, though with some minor edge wear), is significant for the mine and striking in symmetry. Ex. William Larson Collection.
7.5 x 4.9 x 4.3 cm. A fine, sharp schorl crystal from this old classic locality. Unusually it is accented by a few quartzes on the side. Weighs 265 grams. Ex. William Larson Collection.
12.0 x 10.2 x 8.2 cm. A very sharp smoky quartz crystal, with good gemminess and no damage - the combination being quite unusual for San Diego County and in particular this mine. The smoky quartz from here has great internal brilliance and thus is valued as gem rough. Ex. William Larson Collection.
6.8 x 4.1 x 3.4 cm. A very illustrative example of how tourmaline grows in pockets, particularly in a highly disrupted pegmatite such as the Himalaya, with a tourmaline showing natural tectonic bending. This we have seen, from time-to-time at other locales…but the Himalaya is famous for its "bent" crystals actually. And this one, on matrix of quartz, is exceptional in that all the others I have seen at this size were loose of matrix. Crudely terminated, but terminated nonetheless. Ex. William Larson Collection.
8.7 x 5.9 x 4.9 cm. Unusual for the county, a very sharp, very gemmy, transparent smoky quartz. Note the color is very rich, almost citrine. Ex. William Larson Collection.
4.1 x 2.5 x 2.2 cm. This is a beautiful miniature, for my taste the most elegant and best-colored Himalaya mine apatite I have seen. Although small, it’s a real jewel for the locality, and something considered quite rare. Ex. William Larson Collection.
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Rob Lavinsky, rob@irocks.com
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