Search Archived Mineral Specimens
- Availability
- Sold
- Locality
- Repete mine, San Juan Co., Utah, United States
- Formula
- Na(H3O)(UO2)3(Se4+O3)2O2·4H2O
- Size
- Miniature 4x2x1cm
- Special Info
- Type Locality
Goldish yellow almost orange platy crystals of Larisaite with yellow bladed, radial Haynesite. It is hard to discern the two but as they occur together, the Larisaite appears a darker yellow or orange color. The Andersonite under sunlight is a bright fluorescent green crust. In the photos, the Andersonite is seen as a light dull crusts, but it glows in the sun. The Larisaite is extremely rare.
- Availability
- Sold
- Featured
- Featured in Special Editions
- Locality
- Franklin, Sussex Co., New Jersey, United States
- Formula
- PbZnSiO4
- Size
- Miniature 5x4x2.5cm
- Special Info
- Type Locality
Colorless bladed crystals to 1mm. Rich specimen in "hancockite" - the lead Epidote.
- Availability
- Sold
- Locality
- Buckeye Mountain, Polk Co., Arkansas, United States
- Formula
- (Fe3+,Fe2+,M)8+x(OH,H2O)9(H2O)2(PO4)5, M = Fe3+
- Size
- Miniature 4.5x3.5x2cm
- Tagged
- phosphate
Laubmannite is a combination of several rare phosphate minerals: Kidwellite, Dufrenite, and Beraunite. Each is a different phosphate phase of similar compositions producing concentric color zones. This is a real nice specimen.
- Availability
- Sold
- Featured
- Featured in Special Editions
- Locality
- Mangualde, Viseu dist., Portugal
- Formula
- Mn2+Fe3+2(PO4)2(OH)2·8H2O
- Size
- SmCabinet 6x4.5x5cm
- Tagged
- phosphate , pegmatite mineral
Yellow Laueite crystals to 0.5mm or more on purple Strengite. Most of the matrix seems to altered to Rockbridgeite. The fringe of the vug which encloses the strengite is Bermanite. There is perhaps some hints of Jahnsite-(CaMnMn). Some areas contain a lot of carbonate apatite. The exact mine locality is not known. The Mangualde district pegmatites are granitic and rich in phosphates. Garske label.
- Availability
- Sold
- Featured
- Featured in Special Editions
- Locality
- Hagendorf-Süd, Oberpfälzer Wald, Bavaria, Germany
- Formula
- Mn2+Fe3+2(PO4)2(OH)2·8H2O
- Size
- SmCabinet 6x3x2cm
- Tagged
- phosphate
Spongy, limonitic specimen with abundant, fairly large yellow Laueite crystals to 1mm.
- Availability
- Sold
- Locality
- Grand Reef mine, Graham Co., Arizona, United States
- Formula
- Pb7F12Cl2
- Size
- SmCabinet 6x6x4cm
- Special Info
- Type Locality
- Special Info
- XRD Confirmed
Large, silky-white to colorless compact fibrous or prismatic crystal groups of Laurelite. There are many more crystals than those photographed. Usually Laurelite crystals are microscopic acicular crystals occuring in bundles. These crystals are therefore untypically large and unsual in habit. They were verified by XRD. There are also the more trypical tiny acicular habit Laurelite crystals on the matrix.
The specimen as a whole is mineralogically a very interesting specimen which shows the paragenesis of the minerals produced. Unknown are the yellowish clusters which are somewhat pearly and flaky and very soft. The crystals are too small to XRD (I tried), but I don't know what EDS would show given the composition of these oxyhalides. Most of the colorless, equant crystals lining the cavity are Anglesite. The exterior wall contains a black oxide with a sooty overgrowth. There is also Caledonite and what seems to Boleite, although it is not reported at the Grand Reef.
Whoever is the lucky next owner of this specimen will have to do some work on the yellowish cluster as well as the secondary minerals along the exterior. May be some new minerals on this specimen.
