Rare Mineral Specimens - search page
- Availability
- Available
- Price
- $125.00
- Featured
- Featured in Special Editions
- Locality
- Paratoo Cu mine, Mt Lofty Ranges, South Australia, Australia
- Formula
- Y4Cu(CO3)4Cl(OH)5·2H2O
- Size
- 6 x 5 x 1.5 cm - Sm Cabinet
- Tagged
- carbonate, copper, REE mineral
Bright sky blue globular crystal aggregtes to 0.75mm and as large patches or crusts 3 x4mm in area. Decrespignyite-(Y) is a yttrium - copper bearing REM and a carbonate. It is according to Mindat composed of individual tiny pseudohexagonal, often curved platelets. It is found at only one locality worldwide.
As noted by the mineral name, Decrespignyite-(Y), contains the rare-earth element yttrium. Major applications of yttrium are extensive and include fluorescent lamps, phosphor compounds in computer monitirs, lasers, lighting applications, abrasives, bearings, and high-temperature alloys amongst others. Recent cost for yttrium oxide in 2019 was $14/lb down from $65/1b in 2011. The main source for yttrium is China, but worldwide reserves are found in Australia, Brazil, and India.
- Availability
- Available
- Price
- $75.00
- Featured
- Featured in Special Editions
- Locality
- Yukspor Mt, Khibiny Massif, Kola Peninsula, Russia
- Formula
- Na2Ba6Ce2Fe2+Ti3Si12O36(OH)10·nH2O
- Size
- 2.5 x 2 x 1.5 cm - Thumbnail
- Tagged
- REE mineral
- Special Info
- Type Locality
Tan platy crystals to 2mm in one place. Type and only locality. Extremely rare.
- Availability
- Available
- Price
- $40.00
- Locality
- Tsumeb mine, Tsumeb, Namibia
- Formula
- PbCuAsO4(OH)
- Size
- 3.5 x 2.5 x 2 cm - Miniature
- Tagged
- arsenate, copper
Lime green micro crystals of Duftite with Rosasite(?). Ex - Dr. Gebhard specimen.
- Availability
- Sold
- Locality
- Tsumeb mine, Tsumeb, Namibia
- Formula
- PbCuAsO4(OH)
- Size
- 4 x 2.5 x 1.5 cm - Miniature
- Tagged
- arsenate
Tiny crystals, less than 0.5mm, of Duftite on white Dolomite crystals. The Duftite forms bladed crystals with pointed terminations when seen as singles. Most of the Duftite, however, is in thick clusters. Of note is the preferential crystallization of the Duftite upon the Dolomite likely caused by slight ionic charges attracting the Duftite on certain, but consistent, faces of the Dolomite.
- Availability
- Available
- Price
- $20.00
- Featured
- Featured in Special Editions
- Locality
- Mt. Vesuvius, Somma Complex, Napoli, Campania, Italy
- Formula
- KNaCu3O(SO4)3
- Size
- 0.3 x 0.3 x 0.3 cm - Thumbnail
- Tagged
- copper
- Special Info
- Type Locality
Green pulverulent crusts in capsule. Type Locality.
- Availability
- Sold
- Locality
- Little Patsy pegmatite, Jefferson Co., Colorado, United States
- Formula
- CeF3
- Size
- 2.5 x 1.5 x 0.8 cm - Thumbnail
- Tagged
- REE mineral
Two excellent crystals in combo to 1.7cm. The Little Patsy boast the best and largest crystals in the world. This one is quite nice with good form on both crystals.
