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Mineral Specimens with Gold
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A beautifully bright gold thumbnail with two leaves filled like a sandwich with smaller gold leaves from the Round Mountain Mine in Nevada. One leaf is also partially covered with tiny gold leaves. Round Mountain is an open pit, heap leach gold operation, so ANY visible gold is VERY DESIRABLE. 1.4 x 0.4 x 0.4 cm
3.5 x 1.7 x 1.4 cm. This is a very aesthetic piece featuring a predominant, bright "leaf" of Gold sitting atop Quartz matrix. This specimen came to Brian Kosnar from the Leigh Price collection which he purchased it in 2002. The story of this piece came from Brian and his family directly from Leigh after he obtained the specimen. Originally this piece was purchased by mineral collector George Robertson from a dentist in Telluride in the late 1970s. From 1933 until the end of 1974, private citizens in the United States were not allowed to own Gold, but there was an exception for dentists since they require Gold for fillings, crowns, etc. The dentist who owned this specimen would often acquire Gold from the local miners around Telluride since it was more directly available. Obviously he was not interested in using it for dental work as he had a few specimens of Gold in a small private collection. After George Robertson acquired the piece he sold it to Leigh Price sometime in the 1980s. There is a small black and white photocopy of the original label which accompanies the specimen. The reverse side of the piece indicates that the main "leaf" on this specimen has been reinforced in order to stabilize it. Overall, this is an historic and rarely seen Gold specimen from a hard to find locality in the famous San Juan Mountains.
3.3 x 2.6 x 0.25 cm. An exquisite plate composed of intergrown, dense gold crystals. This is a rich and attractive miniature for this important, historic old locality and such specimens are hard to come by. Although there are no old labels, a friend of mine who specializes in these localities, Josef Vajdak, has taken the piece to compare personally to those in museums in Vienna and in Prague, to be certain of its legitimacy.
4.4 x 3.9 x 3.2 cm. The 16 to 1 mine is famous for these strangely colored gold specimens, and it turns out that the patina is in part due to a bit of copper present, and mixed in with, the gold. This is an unusual effect in nature, gold being the noble metal and notoriously difficult to get to alloy in nature. Yet, here we have it, and with a very fine color as a result, sort of a more bronzey-gold hue. From an old gold country collection purchased from a family, several years ago. Mass is 66 grams (2 troy ounces plus a bit). Of this, most of that mass, at a guess 85% or more, is gold.
1.6 x 1.5 x 0.8 cm. A superb gold on quartz thumbnail from the Eagle’s Nest Mine. Very bright, rich yellow gold crystals as elongated spinel-twins and smaller hoppered octahedrons comprise this very aesthetic piece. The sculptural gold looks just like a stylized praying mantis to me.
6.8 x 2.9 x 2.6 cm. A rare and seldom available specimen from the historic Andacollo Mine of the Coquimbo Region of Chile. The crystals of this beautifully aesthetic, arborescent copper crystal cluster with a "tail" are coated with microscopic bits of bright, rich, yellow gold. Classic, old-time and seldom available material from this famous locale. Ex. Jaime Bird Collection.
0.9 x 0.8 x 0.7 cm (largest). A fine 2-piece set from England’s most famous gold locality, Hope’s Nose in Devon. These beautiful and sculptural, arborescent thumbnails consist of rich golden, spinel-twinned "limbs" of hoppered octahedrons. Excellent material from this well-known locality. Ex. Irv Brown Thumbnail Collection.
3.3 x 2.6 x 0.7 cm. This is a very impressive specimen featuring well crystallized, sharp dodecahedra and "ribbons" of Gold with minor Quartz. This specimen came to Brian Kosnar from the Leigh Price collection which he purchased it in 2002. This was one of only a handful of Gold specimens in Leigh's collection. The story of this piece came from Brian and his family directly from Leigh after he obtained the specimen. Originally this piece was purchased by Colorado mineral collector George Robertson from an old-time miner in Leadville in the 1970s. After George Robertson acquired the piece he sold it to Leigh Price sometime in the 1980s. Unfortunately, both Leigh and George have passed on, but I believe the story, and George was a very well respected and thorough collector in his day. There is a small handwritten label which accompanies the specimen, but that is all the pedigree I have. There is a number "101" glued to the back of the piece, but I don't know how it pertains to the pedigree. Overall, the quality is very impressive, and this is actually a "Dana Locality" which makes it even more desirable and prestigious. Ex. Leigh Price and George Robertson 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.
3.3 x 1.7 x 0.8 cm. A beautiful, arborescent gold crystal specimen from the Eagle’s Nest Mine. Flattened, leaf-like octahedrons attached to golden "stalks" with lustrous, bright gold color and a bit of quartz comprise is very sculptural and aesthetic specimen.
5.2 x 4.7 x 3.6 cm. A very rarely seen specimen of Gold from the Star of the West mine in Colorado. This mine is also known as the Red Jacket mine, but the older labels seem to state Star of The West mine. The piece hosts small, brilliant crystallized native Gold along with a few rare, and highly sought after flattened "wires" on matrix. The piece comes with an older label which states the piece came from the upper level of the mine. It is unclear how old the specimen is, but it is safe to say that it would be at least 30 years old, and probably closer to 50 years. A good reference Gold specimen from one of the lesser publicized Gold localities in Colorado. Ex. Richard Kosnar Collection.
8.5 x 6.3 x 3.5 cm. A striking, sculptural, rich band of crystallized, bright yellow gold is very aesthetically set across the crystallized to massive quartz matrix on this excellent specimen from recent finds at the Round Mountain Mine of Nevada. Most of the gold is crystallized as intergrown, leaf-like, flattened octahedrons or as flat plates, but there are some spinel-twins at the ends of some of the clusters. The interesting 2.3 cm vug lined with quartz crystals is a very nice accent.
9.2 x 6.4 x 0.4 cm. This slabbed specimen is one of the few of its kind that I have seen from this mine. It features several patches of "Cloud Gold" which is a speckling of small "dust"-like areas of Gold which are intergrown with white Quartz and associated with Galena, Sphalerite and Chalcopyrite, but the most interesting aspect of this specimen is the fact that it features pink patches of the rare Manganese Silicate, Pyroxmangite. This association of Gold with Pyroxmangite is very rare, and possibly unique to the Sunnyside mine. From the 2130 Stope, G Level, La Belle Creole Vein of the mine. This specimen was mined in 1966, and comes from the noted Colorado Gold collection of Richard A. Kosnar.
2.5 x 1.2 x 0.7 cm. This mesmerizingly beautiful gold specimen is complexly intertwined on itself, and is an excellent example of the rare rope habit in gold, found in Siberia more than anywhere else in the past. Ex. Laura and Stevia Thompson 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.
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Rob Lavinsky, rob@irocks.com
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