Search Archived Mineral Specimens
- Availability
- Sold
- Featured
- Featured in Special Editions
- Locality
- Hagendorf-Süd, Oberpfälzer Wald, Bavaria, Germany
- Formula
- NaCaMn2+Fe2+2(PO4)3
- Size
- Cabinet 10x6x4cm
- Tagged
- phosphate , pegmatite mineral
Dull, black zones of Hagendorfite in Triphylite. Ex. Dr. F. Krantz collection, with tag (see prov. tab).
- Availability
- Sold
- Locality
- Poudrette quarry, Mont Saint-Hilaire, Montérégie, Québec, Canada
- Formula
- (Na,Ca)5Ca(Ti,Nb)5Si12O34(OH,F)8·5H2O
- Size
- SmCabinet 6.5x4.5x2cm
- Special Info
- Type & Only Locality
Honey colored prismatic crystals of Haineaulite with square, orthorhombic cross-sections to 2mm associated with purple Fluorite and white or colorless Natrolite.
Haineaultite is a very rare niobium-titanium silicated found only at MSH. This is a very good specimen.
- Availability
- Sold
- Locality
- Poudrette quarry, Mont Saint-Hilaire, Montérégie, Québec, 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, Presido 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, Presido 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, Presido 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.
