Search Archived Mineral Specimens
- Availability
- Sold
- Locality
- Dara-Pioz Glacier, Alayskiy Range, Tien Shan Mts, Tajikistan
- Formula
- Ca4Ce3+2TiB4Si4O22(OH)2
- Size
- SmCabinet 5.5x3.5x3cm
- Tagged
- REE mineral
A 5mm brown plate of Tadzhikite-(Ce) with black Pyrochlore group memebr and thick, pink plates of Sogdianite.
- Availability
- Sold
- Locality
- Bou Azzer dist., Anti-Atlas, Morocco
- Formula
- Ca2Mg(AsO4)2ยท2H2O
- Size
- SmCabinet 5.5x4x3cm
- Tagged
- arsenate
Beautiful raspberry red crystals of Talmessite to 3mm in a Dolomite vug.
- Availability
- Sold
- Locality
- Lovelock mine, Churchill Co., Nevada, United States
- Formula
- Ca2Cu9(AsO4)4(SO4)0.5(OH)9 9H2O
- Size
- SmCabinet 6x4x4cm
- Tagged
- arsenate , copper
I have previously sold this occurence Tangdanite as Clinotyrolite, which has been discredited as being the same as Tangdanite. Mindat also states: "Unique combination of elements (the only Ca-Cu arsenate-sulphate mineral known)."
The crystals are stunning in-hand and even more so under the microscope. These are flat-lying to about 2mm across. Some of crystals are free-standing.
- Availability
- Sold
- Featured
- Featured in Special Editions
- Locality
- Raposa pegmatite, São José do Sabugi, Paraíba, Brazil
- Formula
- Y(Ta,Ti,Nb)2O6
- Size
- Thumbnail 0.5x0.3x0.3cm
- Tagged
- REE mineral
- Special Info
- Type Locality
A 5mm chip of Tantalaeschynite-(Y), a black rare-earth mineral with a resinous luster. It is named for the tantalian end-member of a series with aeschynite-(Y). Tantalaeschynite-(Y) is very rare and found, according to Mindat, is found in only (published) three deposits worldwide. This is the type locality.
- Availability
- Sold
- Locality
- São Pedro, Malacacheta dist., Minas Gerais, Brazil
- Formula
- Fe2+Ta2O6
- Size
- Miniature 4.5x4.5x2.5cm
- Tagged
- pegmatite mineral
Fantastic specimen of Tantalite-Columbite showing complex crystal forms with all faces showing oblique "growth striations" to the intersections of the faces.
- Availability
- Sold
- Locality
- Alto do Giz pegmatite, Rio Grande do Norte, Brazil
- Formula
- Mn2+Ta2O6
- Size
- Miniature 5x4.5x3cm
A thick tabular, shiny, very nice crystal of Tantalite. The crystal tapers downward and has many slightly striated faces.
