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Quartz (Var: Ametrine) : SiO2 | |
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Santa Cruz Department, Bolivia A slice from an "ametrine" variety Quartz crystal. Interesting "radioactivity symbol" pattern. Etched oxidized iron on exterior. 6.5 cm across. |
| © J.N. Wingard | Photo ID: 78359 View Count: 312 |
Quartz (Var: Ametrine) : SiO2 | |
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Anahí Mine (Anay Mine; Anai Mine), La Gaiba District, Sandoval Province, Santa Cruz Department, Bolivia 7.4 x 3.3 x 2.9 cm. A floater crystal of "ametrine" quartz from Bolivia - combining the golden citrine hue with purple amethystine hue. These crystals are naturally etched into these weird forms. This one actually is euhedral with some glassy faces at one end, which is unusual. |
| © Rob Lavinsky | Photo ID: 177270 View Count: 346 |
Quartz (Var: Ametrine) : SiO2 | |
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Anahí Mine (Anay Mine; Anai Mine), La Gaiba District, Sandoval Province, Santa Cruz Department, Bolivia Specimen Size: 7.0 x 6.6 x 2.8 cm. A polished slice (cross section) of Quartz (var: "Ametrine") showing the alternating zones of rich purple and yellow that exist within these natural bicolor crystals. It should be noted that the purple "Amethyst" portion of the crystals show strong Brazil-law twinning, while the yellow "Citrine" areas do not ... |
| © Brian Kosnar | Photo ID: 233854 View Count: 718 |
Quartz (Var: Ametrine) : SiO2, Quartz : SiO2 | |
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Anahí Mine (Anay Mine; Anai Mine), La Gaiba District, Sandoval Province, Santa Cruz Department, Bolivia Most specimens from this find rarely exhibit crystal faces, however, this piece is well-crystallized, by ametrine standards, showing a REAL termination instead of just numerous etched faces. This facet-grade specimen is primarily a rich amethyst color with a center stripe of citrine. In photos, the amethyst dominates more than in person, where the ... |
| © Rob Lavinsky | Photo ID: 60954 View Count: 717 |
Quartz (Var: Ametrine) : SiO2 | |
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Anahí Mine (Anay Mine; Anai Mine), La Gaiba District, Sandoval Province, Santa Cruz Department, Bolivia A specimen of natural ametrine (not heated to create citrine), with about an even balance of yellow citrine and purple amethyst. Good lapidary material, or keep it as a specimen - as although it is naturally etched, it still shows faces. 8.0 x 5.5 x 3.4 cm |
| © Rob Lavinsky | Photo ID: 67741 View Count: 306 |
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Anahí Mine (Anay Mine; Anai Mine), La Gaiba District, Sandoval Province, Santa Cruz Department, Bolivia 12.1 x 5.2 x 3.2 cm. This amethyst crystal was naturally etched by corrosive solutions in the pocket into this weird form. Inside the jagged surface is a gemmy interior of great clarity and bright purple color, with hints of orangey citrine. You can see some of the original faces that were preserved, though smoothed, by the etching. |
| © Rob Lavinsky | Photo ID: 135096 View Count: 143 |
Quartz (Var: Ametrine) : SiO2 | |
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Anahí Mine (Anay Mine; Anai Mine), La Gaiba District, Sandoval Province, Santa Cruz Department, Bolivia 14.8 x 4.4 x 3.9 cm. This is a large crystal of "ametrine" (combination of yellow and purple tones) quartz from Bolivia, which got its weird form and silky luster from natural etching. If you hold it up to the light, you can see that it is very gemmy through the center; these are sometimes cut into stones, often showing the multiple colors. This ... |
| © Rob Lavinsky | Photo ID: 165702 View Count: 132 |
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Anahí Mine (Anay Mine; Anai Mine), La Gaiba District, Sandoval Province, Santa Cruz Department, Bolivia 12.7 x 3.6 x 3.4 cm. This is a large, complete, naturally-etched crystal of ametrine from Bolivia. These crystals take on this weird form from etching by corrosive solutions in the pockets. This one has only hints of the yellowish citrine shade of quartz. The exterior is silky, and you can see through small "windows" how the interior is clear as ... |
| © Rob Lavinsky | Photo ID: 133909 View Count: 123 |
Quartz (Var: Ametrine) : SiO2 | |
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Anahí Mine (Anay Mine; Anai Mine), La Gaiba District, Sandoval Province, Santa Cruz Department, Bolivia 11.8 x 3.8 x 2.9 cm. A large crystal of natural ametrine (amethyst and citrine hues combined in a single crystal), from Bolivia. The strange forms of these crystals result from natural etching in the pockets in which they form. They are absolutely clear through the interiors, with a silky surface. |
| © Rob Lavinsky | Photo ID: 217541 View Count: 64 |
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