Search Archived Mineral Specimens
- Availability
- Sold
- Locality
- Poudrette quarry, Mont Saint-Hilaire, Quebec, Canada
- Formula
- (Na,Ca)5Ca(Ti,Nb)5Si12O34(OH,F)8·5H2O
- Size
- Miniature 3.5x2.5x1.5cm
- Special Info
- Type & Only Locality
At least five excellent light yellow orthorhombic prisms with square outline. Very good mirco crystals, easily seen. This is the type and only locality in the world.
- Availability
- Sold
- Locality
- Mammoth mine, Jeff Davis Co., Texas, United States
- Formula
- Ca(UO2)2Si5O12(OH)2·3H2O
- Size
- SmCabinet 7.5x4x2cm
- Special Info
- Radioactive!!
Yellow Haweeite in clusters with glassy yellow prismatic Uranophane to 1.5mm.
- Availability
- Sold
- Locality
- Mammoth mine, Jeff Davis Co., Texas, United States
- Formula
- Ca(UO2)2Si5O12(OH)2·3H2O
- Size
- SmCabinet 7x5x4cm
Light yellow clusters of Haiweeite, less than 0.3mm, scattered in vugs with glassy bright yellow uranophane. A very desirable locality.
- Availability
- Sold
- Locality
- Mammoth mine, Jeff Davis Co., Texas, United States
- Formula
- Ca(UO2)2Si5O12(OH)2·3H2O
- Size
- SmCabinet 8x4x4cm
Little, less than 1mm, faint yellow puff balls lining rhyolitic/tuff(?) matrix with larger, glassy excellent yellow sprays of Uranophane.
- Availability
- Sold
- Locality
- Teofilo Otoni, Minas Gerais, Southeast Region, Brazil
- Formula
- Ca(UO2)2Si5O12(OH)2·3H2O
- Size
- Miniature 4x4x3cm
Bright yellow sprays and tufts of Haiweeite from 3 to 6mm across, which is quite large for this occurence. with some orange yellow Uranophane. This is an outstanding specimen with good coverage on the face and along the sides. There are funny transparent colorless, worm-like crystals with green tips on this specimen. I have no idea what these are and if you buy it and analyze it, please let me know the result.
- Availability
- Sold
- Locality
- Teofilo Otoni, Minas Gerais, Southeast Region, Brazil
- Formula
- Ca(UO2)2Si5O12(OH)2·3H2O
- Size
- SmCabinet 7.5x5x3.5cm
A very, very rich specimen loaded with canary yellow sprays of Haiweeite to 2mm. Excellent showy specimen of this rare mineral. Coverage front and back.
