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Tourmaline (Var: Achroite) : AD3G6(BO3)3[T6O18]Y3Z | |
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Nuristan Province (Nurestan; Nooristan), Afghanistan 2.6 x 0.3 x 0.3 cm. The tourmaline moniker "achroite" designates the VERY rare COLORLESS variety - so common in other crystals, but extremely unusual in tourmalines! This crystal starts out a delicate pink; then there is a band of bright grass green in the middle. Then, more than half of the upper part of the crystal is glass-clear! The whole ... |
| © Rob Lavinsky | Photo ID: 118598 View Count: 341 |
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Anjanabonoina pegmatites, Mount Ikaka, Ambohimanambola Commune, Betafo District, Vakinankaratra Region (Betafo - Antsirabé region), Antananarivo Province, Madagascar Another white to white-light green achroite specimen with xls up to 1,5 cm. Overall specimen size is 4,5 x 3 x 1,5 cm. |
| © Marek Patus | Photo ID: 148050 View Count: 356 |
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Anjanabonoina pegmatites, Mount Ikaka, Ambohimanambola Commune, Betafo District, Vakinankaratra Region (Betafo - Antsirabé region), Antananarivo Province, Madagascar Achroite xls up to 1 cm perched on microcline matrix. Overall size 5,5 x 5 x 3,5 cm. |
| © Marek Patus | Photo ID: 148013 View Count: 307 |
Tourmaline (Var: Achroite) : AD3G6(BO3)3[T6O18]Y3Z | |
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Anjanabonoina pegmatites, Mount Ikaka, Ambohimanambola Commune, Betafo District, Vakinankaratra Region (Betafo - Antsirabé region), Antananarivo Province, Madagascar Different achroite xls with sizes between 1,0 to 1,7 cm long. |
| © Marek Patus | Photo ID: 148055 View Count: 189 |
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Tourmaline King Mine (MS 4500; MS 4926; Gem), Tourmaline Queen Mountain (Pala; Queen), Pala District, San Diego Co., California, USA A natural double terminated achroite tourmaline crystal with forest green basal pyramid and opposing pale pink basal pedion; from the Tourmaline King mine, Tourmaline Queen Mountain, San Diego County, California, USA. Specimen measures 27x9x7mm, and weighs 3.8 grams. Recovered from the old upper adit dumps by the San Diego Mining Company in ... |
| © EMC | Photo ID: 250452 View Count: 48 |
Tourmaline (Var: Achroite) : AD3G6(BO3)3[T6O18]Y3Z, Elbaite : [Na][(Li,Al)3][Al6][(OH)3|OH|(BO3)3|Si6O18], Quartz (Var: Smoky Quartz) : SiO2 | |
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East Hampton, Middlesex Co., Connecticut, USA 4 mm nearly colorless elbaite (achroite) crystal in center, and multicolored elbaite on left, all on a smoky quartz crystal. From an unspecified locality in East Hampton (Swanson Mine?). Ex- Warren Johansson collection, field-collected ca. 1939-45. Photograph by Peter Cristofono. |
| © 2006 Peter Cristofono | Photo ID: 61876 View Count: 848 |
Tourmaline (Var: Achroite) : AD3G6(BO3)3[T6O18]Y3Z | |
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Gillette Quarry, Haddam Neck, Haddam, Middlesex Co., Connecticut, USA 7 mm crystal. P. Cristofono specimen and photo. |
| © 2006 Peter Cristofono | Photo ID: 62341 View Count: 480 |
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