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Ulexite : NaCa[B5O6(OH)6] · 5H2O | |
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Niederellenbach, Alheim, Rotenburg an der Fulda, North Hesse, Hesse, Germany Picture width is 6mm. White fibrous crystals of Ulexite. Depth of field is achieved with CombineZM. |
| © Elmar Lackner | Photo ID: 95220 View Count: 267 |
Ulexite : NaCa[B5O6(OH)6] · 5H2O | |
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Kohnstein Quarry, Niedersachswerfen, Nordhausen, Harz Mts, Thuringia, Germany Fibrous white ulexite. Specimen size 3 cm. |
| © Thomas Witzke | Photo ID: 243602 View Count: 52 |
Ulexite : NaCa[B5O6(OH)6] · 5H2O | |
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Arequipa, Arequipa Province, Arequipa Department, Peru 9 x 8.5 x 5.0 cm. This is a very fine, rich, and large example of ulexite from Peru. It is crystallized in globular clusters, and complete all around. Ex. Philadelphia Academy of Sciences Collection. |
| © Rob Lavinsky | Photo ID: 199920 View Count: 132 |
Ulexite : NaCa[B5O6(OH)6] · 5H2O | |
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Bigadiç, Balikesir Province, Marmara Region, Turkey 7 cm sample. S411-02 Photographer' specimen, deacquisitioned. |
| © 2008, JGW | Photo ID: 149415 View Count: 295 |
Ulexite : NaCa[B5O6(OH)6] · 5H2O | |
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Bigadiç Mine, Bigadiç, Balikesir Province, Marmara Region, Turkey Overall size: 23 x 25 x 20 mm Photo and collection Antonio Borrelli |
| © Antonio Borrelli | Photo ID: 38833 View Count: 537 |
Ulexite : NaCa[B5O6(OH)6] · 5H2O, Calcite : CaCO3 | |
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Boron, Kramer District, Kern Co., California, USA The borate deposits of California have produced some really beautiful/oddball mineral specimens. Few are as unusual as ulexite, also called "TV rock" for its fiber-optic-like optical properties. This particular matrix specimen is TERMINATED, something you almost NEVER see in the mineral; and it has superior prismatic luster and a pearlescent, ... |
| © Rob Lavinsky | Photo ID: 40062 View Count: 501 |
Ulexite : NaCa[B5O6(OH)6] · 5H2O | |
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Boron, Kramer District, Kern Co., California, USA Ulexite ('television stone'), specimen width 4 cm. |
| © Peter Kohorst | Photo ID: 60189 View Count: 405 |
Ulexite : NaCa[B5O6(OH)6] · 5H2O, Colemanite : Ca[B3O4(OH)3] · H2O | |
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Boron, Kramer District, Kern Co., California, USA Hair-like crystals of white ulexite in a tuft along with pale brown, translucent colemanite crystals. This is a good example of ulexite crystals, unlike the massive TV-rock sold at shows. Label indicates it was purchased from Zeitner Geol. Museum, SD. Ex. Robert C. Linck (1905-1970). Overall size of mineral specimen: 6x4x4 cm. Size of individual ... |
| © 2003 John H. Betts | Photo ID: 9827 View Count: 641 |
Ulexite : NaCa[B5O6(OH)6] · 5H2O | |
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Boron, Kramer District, Kern Co., California, USA Here is a 3x3x1 inch piece of ulexite, often called TV rock for its ability to project images along the length of the fibers much like fiber optics. |
| © Charles Creekmur | Photo ID: 20647 View Count: 459 |
Ulexite : NaCa[B5O6(OH)6] · 5H2O | |
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Boron, Kramer District, Kern Co., California, USA This is a great example of the transparent and colorless mineral known as "TV rock" because it has optical properties like fiber-optic cable. It is transparent along the perfect vertical axis, while opaque along other axes. When polished, as this is, you can hold it over writing and witness this phenomenon. Is this a fine mineral specimen? No, not ... |
| © Rob Lavinsky | Photo ID: 39572 View Count: 438 |
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