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2413 specimens listed
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Chalcophyllite, Cornubite, Cornwallite, Cuprite and Liskeardite? Cornish classic.
stock #20.1-342
Penberthy Croft Mine, St. Hillary
Cornwall, England
4.2 x 3 x 2.1 CM (small miniature/ large thumbnail (toenail))
price: $300
Pre Tucson

A lot of species on this small specimen! The matrix here has a few small Cuprite crystals on the edges but the main open vug is packed with crystals of colorful Copper secondary minerals. The Chalcophyllite is most prominent with well-defined crystals in classic habit. It is quite rich for this locality. This is a very old mine, closed in 1840. An attractive piece though small, the Cornubite and Cornwallite are visually rather similar both in botryoidal zones and some very tiny druses, we are copying earlier labels and using previous owners checking to include both species on our listing, but we have not done further testing. There may be other species present as well, it is a densely populated specimen! I am unsure about the Liskardite, it is supposed to be there but the only spots I can find with magnification that may be this specie are very hard to see well. If present it is a very small amount and only listed for completeness. An uncommon Cornish multi-specie piece that is quite colorful.

Flourite - elongated Sspinel twin, multi color
stock #23.1-223
Hohenstein Massif, Omaruru District
Erongo Region, Namibia
3.3 x 1.6 x .8 CM (small miniature/ large thumbnail (toenail))
price: $600
Pre Tucson

A textbook perfect spinel-twin crystal of Fluorite with amazing internal colors. From the find three years ago in the Erongos, this is a killer thumbnail to toenail specimen that looks fine on all sides. In excellent undamaged condition there is a small Schorl crystal jutting off the side as well. As was typical of this unusual find, some faces are quite smooth and transparent while others are frosted and more translucent. The internals in this are much like strings of color, yellow, orange, purple and a hint of red. Fluorite is by far the most collected mineral specie in the world, this piece shows why, it is colorful, strange and pretty.

Elbaite - blue-green gem crystal
stock #23.1-560
Barra do Salinas Mining District, Coronel Murta
Minas Gerais, Brazil
3.1 x .8 x.7 CM (small miniature/ large thumbnail (toenail))
price: $340
Pre Tucson

A single very clear gem Tourmaline crystal with a color that is a bit more dark blue than green in most light. The termination is complete with the distinctive etched steps of good Barra do Salinas tips. Bright luster and glows well with backlighting. The costs of any blue Elbaite has gotten very high recently, this is a much more down to earth price and very good value.

Topaz - classic Mexican gem crystals
stock #23.1-559
Tepetate, Municipio de Villa Arriaga
San Luis Potosi, Mexico
2.5 x 2.1 x 1.3 CM ()
price: $160
Pre Tucson

A pair of gemmy crystals with good cognac color jut out from the matrix. A classic Mexican habit for Topaz, this is the desired type from the famed Tepetate in San Luis Potosi. An excellent thumbnail that displays super well and is still affordable. Vintage 1970-80 era. These were common and affordable at one time, now we never see new pieces but many older collections still hold some nice ones.

Columbite - well-formed prismatic crystal
stock #23.1-334-(D5924)
Rio Doce District
Minas Gerais, Brazil
3.8 x 2.7 x 2.2 CM (miniature)
price: $550
Pre Tucson

Unusually sharp, lustrous (for Columbite) and perfectly terminated, this is a choice single crystal of the specie. Ex University of Delaware Museum, the condition is outstanding especially given the fragility of Columbite. A heavy piece (just over 74 grams despite the small size), a textbook perfect example from the Brazilian pegmatites of Rio Doce.

SOLD Calcite with Malachite - unusual Colorado specimen
stock #SOLD 13.1-154
Copper Rivet Mine, Mesa County
Colorado, United States
5.2 x 3.8 x 2.4 CM (small cabinet/ large miniature)
price: $0
Pre Tucson

Unusual and attractive specimen with a look that is very unusual for Colorado! The doubly terminated Calcite (twinned) is nicely perched on contrasting Malachite. With magnification it can be seen that the Malachite is both on and in smaller Calcite crystals and has a silky texture. In very good condition as seen, I have only ever seen one other example from this locale, and this piece is larger and far more well-developed. It seems these were mostly found long ago and a few more collected in 1990. None since and the mine is fully defunct.

Adamite - classic pinwheel clusters
stock #9.1-018
Mina Ojuela, Mapimi
Durango, Mexico
4.5 x 3.8 x 2.7 CM (miniature)
price: $650
Pre Tucson

Very fine light yellow-green crystals of Adamite arranged in the "pinwheel" type of radiating spray. A choice miniature in excellent undamaged condition from the classic finds about 20 years ago at Mina Ojuela. Good Mexican Adamites were once rather plentiful but this quality and form were never common. These are now quite hard to find and this is an especially elegant and esthetic piece. The radiating sprays exceed 2 CM across, these contrast with the gossan matrix. Displays well from most any angle, and the matrix is not the ultra fragile, crumbly type.

Dioptase on Calcite
stock #19.1-900
Otjikoto Region, Namibia
4.7 x 2 x 1.7 CM (miniature)
price: $460
Early summer 2023

Sharp gem clear crystals of bright Green Dioptase on contrasting Calcite. A Tsumeb classic, in fine undamaged condition and with well-isolated crystals. Tsumeb produced many great Dioptase but the most desired are those on the white Calcite like this. The vivid green with glassy luster stand out well. Small but impressive and relatively affordable. This is far more pretty in person.