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Chrysoberyl : BeAl2O4 | |
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Balangoda, Ratnapura, Sabaragamuwa Province, Sri Lanka 2.0 x 1.9 x 1.5 cm. A superb, gemmy and lustrous, honey-brown, V-twinned chrysoberyl crystal from the famed Ratnapura area of Sri Lanka. This complete all-around and undamaged beauty has textbook crystal form. A couple of the edge faces are frosted/contacted, but there is no damage, per se and the classic form is certainly not diminished. |
| © Rob Lavinsky | Photo ID: 163995 View Count: 128 |
Thorianite : ThO2 | |
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Balangoda, Ratnapura, Sabaragamuwa Province, Sri Lanka Small rounded isolated crystals of thorianite, of 4 mm as medium size |
| © Marco Barsanti | Photo ID: 13200 View Count: 484 |
Thorianite : ThO2 | |
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Balangoda, Ratnapura, Sabaragamuwa Province, Sri Lanka I tried to get all three cubic crystals of thorianite in view for this photograph. They are glued to a black substrate. Location was originally listed as Balangoda, Ceylon, which has since changed to Sri Lanka (specimen obtained in 1955). Field of view is 1 cm. From Alex Knoll collection, specimen #5765. |
| © Beth Schaefer | Photo ID: 169433 View Count: 117 |
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Balangoda, Ratnapura, Sabaragamuwa Province, Sri Lanka Cubic crystals of Thorianite from the type locality, collected before WWII. Three of them demonstrate twining according to fluorite law. Size of standard plastic box is 26x26 mm. Total radioactivity of these crystals is 420 μR/h. Look on the original label on the daughter photo. Pavel M. Kartashov collection (#1081) and photo. |
| © Pavel M. Kartashov | Photo ID: 245814 View Count: 60 |
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