Lepidolite-quartz (Peerlesss Mine, Black Hills, South Dakota, USA) 1 : 無料・フリー素材/写真
Lepidolite-quartz (Peerlesss Mine, Black Hills, South Dakota, USA) 1 / James St. John
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
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| 説明 | Lepidolite & quartz from South Dakota, USA. (Karl E. Limper Geology Museum collection, Miami University, Oxford, Ohio, USA)The coarsely-crystalline granite seen here is a pegmatite, an intrusive igneous rock having crystals greater than 1 centimeter in size. Most pegmatites by cooling of water-rich, felsic magma. Dominant minerals in pegmatites are quartz, feldspar, and mica. Unusual minerals can be common in pegmatites, such as tourmaline, beryl, and uraninite. This example is composed of quartz and lepidolite, a lithium-rich mica, KLi2Al(Al,Si)3O10(F,OH)2 - potassium lithium fluoro-hydroxy-aluminosilicate.------------------------------------Exhibit info.:Lepidolite in QuartzPeerless Mine, Custar County, South DakotaLepidolite is a mica mineral similar to muscovite, but enriched in lithium. It is the most abundant lithium-bearing mineral and a secondary source of this metal. It is also the major source of rubidium. Lepidolite can range in color from pink to purple to red, gray, and yellow.------------------------------------Locality: Peerless Mine, Keystone Mining District, Black Hills, western South Dakota, USA |
| 撮影日 | 2025-04-26 11:47:47 |
| 撮影者 | James St. John |
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