Search Archived Mineral Specimens
- Availability
- Sold
- Locality
- Swamp No. 1 quarry, Topsham, Sagadahoc Co., Maine, United States
- Formula
- (U,Fe,Y)NbO4
- Size
- Miniature 3.5x3x2.5cm
- Tagged
- REE mineral , pegmatite mineral
Grey prismatic crystals from 2-5mm in orange-rusty red Monazite. Excellent specimen. This is a niobium-yttrium-fluorine type of pegmatite.
- Availability
- Sold
- Locality
- Konder massif, Aldan shield, Ayan-Maya, Khabarovskiy Kray, Russia
- Formula
- Pt3Fe
- Size
- Thumbnail 0.4x0.2x0.2cm
Sharp, excellent, greyish gold cubic crystal. 4x2x2mm in size.
- Availability
- Sold
- Locality
- Nkumbwa Hill Carbonatite, Isoka dist., Northern prov., Zambia
- Formula
- CaMgPO4F
- Size
- Thumbnail 2.3x1.3x1.0cm
- Tagged
- phosphate
- Special Info
- Type Locality
Type locality for this rare mineral found as white plates which radiate for the most part.
- Availability
- Sold
- Locality
- Oyashirazu beach, Ōmi, Itoigawa City, Niigata, Japan
- Formula
- SrAl2Si2O7(OH)2·H2O
- Size
- Thumbnail 0.4x0.3x0.3cm
- Special Info
- Type Locality
A small blue grain. Itoigawaite is a two locality mineral.
- Availability
- Sold
- Locality
- Gun Claims, MacMillian Pass, Itsy Mountains, Yukon Territory, Canada
- Formula
- Ba2Ca(BSi2O7)2
- Size
- Miniature 4x3x2cm
- Special Info
- Type Locality
- Special Info
- XRD Confirmed
- Special Info
- EDS Confirmed
Itsiite is a new barium calc-silicate found at the Gun Claims in the Itsy Mountains of the Yukon Territy. Approved by the IMA in 2013 (IMA 2013-085), it was studied and authored by Anthony R. Kampf, Ronald C. Peterson und Brian R. Joy CNMNC Newsletter No. 18, December 2013,
page 3255; Mineralogical Magazine, 77, 3249-3258. It occurs as blue platy crystals.
- Availability
- Sold
- Locality
- Helen Beryl mine, Custer Co., South Dakota, United States
- Formula
- (Ta,Nb,Sn,Fe,Mn)O2
- Size
- SmCabinet 6x5x2.5cm
- Tagged
- tin
- Special Info
- EDS Confirmed
(EDS) It looks like Columbite but contains enough manganese, iron, and tin to be called Ixiolite, which is rare in the Black Hills. This is so far the only locality in the Black Hills. Streak alone is not enough to distingish it from Columbite but can eliminate Cassiterite, which is usually colorless to very hard brownish red. This specimen streaks a hard black. Of course nothing is concrete with any of these black oxides in pegmatites so EDS is pretty much required.
