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Mineral Specimens with Gold
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This is an attractive and hefty nugget with lots of eye appeal! It is from Tibboburra, a locality quite distinct from teh common goldfields in Victoria where most Aussie nuggets come from; and, I am told, this is a verylarge nugget for the Tibboburra locality. It can be distinguished from Victoria material by a slightly brassier color combined with generally better, more metallic lustre (as this piece exemplifies). Note that it DOES have crude crystal forms, plus other signs of crystallization throughout (though the faces are rounded, tis true), which is rare on nuggets in general. Anyways, all together it is a decidedly different kind of nugget from teh average rounded and boring piece, with unique and interesting appearance. It has been said to resemble the "Maltese Cross" in person. Floater, complete all around! 5 x 4.5 x 1.1 cm
This is a really bright and colorful specimen from this rare locality! It features wispy, brassy gold crystals that are crystallized but "leafy" in appearance. In addition to the gold that is freestanding, it is obvious that veins extend inside the matrix as well. These are extremely hard to come by and in fact I was unaware of good specimens for sale until a friend of mine obtained a small stash of them - collected several decades ago, too. 6 x 3.5 x 3 cm
This spectacularly showy specimen is equally attractive from both sides. it features a sturdy, intricate mass of dense gold crystals rising like a tree from the matrix (a lucky trim, this!). The gold rises 2 inches (5 cm) in height and is nicely centered, making it one of the prettiest and richest California golds for its size and price range that I have seen in a long time. 6.5 x 4.75 x 2 cm
A specimen of more classic "transylvanian" habit, with leaf gold capped by small trigon crystals of gold. Like the above, its a very fine Nevada locality piece but a damned good gold anyways for the size and price, regardless of the nice locality. Weight approx. 5 grams. 2.8 x 1.75 x 0.5 cm
This unusual specimen came to me in a collection of interesting South African minerals. I had never seen one offered for sale, and apparently the explanation is that the deposit is jealously guarded by both mining interests and the state, and exports are generally forbidden. The piece is a very rich specimen with grains of gold richly dispersed throughout a very strange matrix of lightweight, carbon-rich rock. I've not seen a gold matrix like this, ever, and I am honestly not sure what rock this is...though it at least is pretty. 5 x 4 x 2.5 cm
Bright leaf gold on matrix! A showy large miniature from a new Canadian locality. A very showy specimen with lots of flash and sparkle! 5 x 3 x 3 cm
2.0 x 1.8 x 0.7 cm. This modern-day Gold locality has produced a plethora of amazing Gold specimens featuring a wide range of crystal habits, including some of the most impressive Spinel-Law twinned Gold crystals I have seen. This thumbnail was discovered in 2006 and is a very good representative Gold from the locality. The two main characteristics of the specimen are the wide flattened "sheet"-like part of the piece which comprises the majority of the specimen. Along the edge of the "sheet" are some beautiful, sharp, cuboctahedral and elongated octahedral crystals.
3.6 x 2.1 x 1.0 cm. This is a crystallized mass of 26.3 grams of pure gold, from one of the hardest-to-get US locales for specimens. This gold specimen, which weighs almost 1 ounce, is composed totally of small intergrown crystals. It is bright, lustrous, heavy and much rarer than any California gold. It is most likely 20-30 years out of the ground and specimens of this weight are very rare.
A VERY IMPORTANT Arizona locality gold specimen, weighing in at 105.6 grams (and thus it is worth at least half this value if you simply melt it down!), from several prominent collections. The Bowman collection was well known in Arizona, and Ed David is of course famous for his rich suites of native elements. This was exchanged recently from Ed. It is very hefty and 3-dimensinal, and quite a bit brassier and brighter in person than it appears here. It comes with a custom little display base, too. 4.7 x 4.5 x 0.7 cm
1.4 x 1.3 x 0.4 cm. A sculptural, rounded and pointed gold nugget from the Morro Velho Gold Mine of Brazil. The nugget has rich, golden-buttery lustre and the bit of embedded quartz is a nice accent.
1.6 x 0.8 x 0.4 cm. An aesthetic and sculptural, arborescent thumbnail cluster of richly burnished, golden-yellow gold crystals highlighted by fine, hoppered, octahedral gold crystals. The crowning octahedron at the top, with a mirror face, is 6 mm. This is old-time material from Grass Valley, California.
1.8 x 0.9 x 0.2 cm. A striking and beautiful, brilliant, whitish-yellow gold leaf or feather with distinctively different crystal form on each side. The "A" side is comprised of a mesmerizing, multitude of flattened crystals with triangular octahedral faces in a herringbone pattern. The "B" side is hackly microcrystals. This leaf is from the Dixie Mine of the Idaho Springs District, Colorado.
1.8 x 1.1 x 1.0 cm. This fine, bright gold specimen is highlighted by a large, flattened octahedron, that looks like a shelf, that the rest of the gold specimen rests on. Angled, blocky, elongated, octahedrons in spinel-twinned, echelon growth and small octahedrons comprise the rest of this strikingly formed gold specimen from recent finds at the Round Mountain Mine of Nevada.
3.7 x 3.2 x 1.7 cm. An exquisite and aesthetic, 2.7 cm long, elongated cluster of bright, crystalline gold with "rabbit ears" on top from the Eagle’s Nest Mine of California. Spinel-twins and flattened octahedrons are scattered amongst the microcrystalline gold, in particular in the "ears". I really like the presentation style of the gold rising off of the quartz matrix. Ex. Jaime Bird Collection.
2.8 x 1.9 x 1.8 cm. An aesthetic thumbnail specimen of bright, burnished, microcrystalline gold beautifully concentrated on the crest and richly scattered on the body of the sculptural pink granite matrix, from the unique 1990s St. Johns, Newfoundland find. The pink tint on the granitic quartz and feldspar is unique.
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Rob Lavinsky, rob@irocks.com
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