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Apatite-(CaOH) : Ca5[OH|(PO4)3] | |
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David Mosiah claim, Cerro Huañaquino, Potosí Department, Bolivia Hydroxylapatite crystal, translucent light grey interior, white skin on exterior. Black spots are limonite pseudomorphs after tiny drusy magnetite crystals. Alfredo Petrov collection, 6cm crystal. |
| © alfredo petrov | Photo ID: 81252 View Count: 255 |
Apatite-(CaOH) : Ca5[OH|(PO4)3], Rutile : TiO2 | |
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David Mosiah claim, Cerro Huañaquino, Potosí Department, Bolivia A columnar, double-terminated specimen of the rare variety of Apatite, Hydroxylapatite. This crystal has a green core with a creamy off-white outer zone that is accented by iron oxides. This crystal hosts many tiny black pseudomorphs of Rutile after Ilmenite. A really cool feature of this crystal is that the green inner portion fluoresces a ... |
| © Russell G. Rizzo | Photo ID: 199262 View Count: 61 |
Magnetite : Fe2+Fe3+2O4 | |
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David Mosiah claim, Cerro Huañaquino, Potosí Department, Bolivia Typically the Magnetite crystals from this locality are closely grown together, but this piece has some good isolation between the octahedra. The piece has excellent, sharp, highly lustrous, black, "Alpine-type" octahedra (some are twinned) with Feldspar on matrix. The largest crystal measures 2.5 cm. across! 6.3 x 5 x 4.2 cm |
| © Rob Lavinsky | Photo ID: 23757 View Count: 372 |
Magnetite : Fe2+Fe3+2O4 | |
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David Mosiah claim, Cerro Huañaquino, Potosí Department, Bolivia Magnetite crystals on matrix Field of view mm 15x10 Photo and collection Fabio Brignoli (roccelllans) |
| © Fabio Brignoli | Photo ID: 206770 View Count: 89 |
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