Search Archived Mineral Specimens
- 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
- 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.
- Availability
- Sold
- Locality
- Emmons quarry, Oxford, Co., Maine, United States
- Formula
- (Mn,◻)TaTa2O8
- Size
- Thumbnail 2.3x1.1x1.1cm
- Tagged
- pegmatite mineral
- Special Info
- XRD Confirmed
- Special Info
- EDS Confirmed
An excellent partial tabular black crystal of Tantalowodginite with striations to 1cm across with more in a phosphate matrix. Tantalowodginite is an extremely rare mineral found only at Tanco and the Emmons quarry, the type locality. Analyzed.
- Availability
- Sold
- Locality
- Jote mine, Pampa Larga dist., Tierra Amarilla, Copiapó, Atacama, Chile
- Formula
- Ca5Al2(AsO4)4(OH)4 12H2O
- Size
- Miniature 3.5x2.5x2.5cm
- Special Info
- EDS Confirmed
- Special Info
- Type & Only Locality
This is a new IMA mineral recently approved. Tapiaite forms tiny clear lath-like crystals less than 0.03mm in size. Impossible to capture with my photo set-up, these crystals can nonetheless be seen in the photos as all the hundreds or thousands of reflections all over most of the matrix. It is associated with light bluish green Joteite. This is a fabulous, rich specimen. I have a few more of these if you miss out, just let me know. This is the best one.
- Availability
- Sold
- Locality
- Jote mine, Pampa Larga dist., Tierra Amarilla, Copiapó, Atacama, Chile
- Formula
- Ca5Al2(AsO4)4(OH)4 12H2O
- Size
- Miniature 5x3x3cm
- Special Info
- XRD Confirmed
- Special Info
- EDS Confirmed
- Special Info
- Type & Only Locality
This is a new IMA mineral recently approved. Tapiaite forms tiny clear lath-like crystals less than 0.03mm in size. Impossible to capture with my photo set-up, these crystals can nonetheless be seen in the photos as all the hundreds or thousands of reflections all over most of the matrix. It is associated with light bluish green Joteite. This is a fabulous, rich specimen.
