Gwendel Quartz
耿德石英
 | SiO2SiO₂
These samples of gwendel quartz are displayed in the Smithsonian Museum of Natural History. Gwendel is a variety of quartz , which has the composition SiO2. The sample at left is about 20 cm across and is from Tiefengletscher, Furka, Uri, Switzerland. 这些gwendel石英样本陈列在史密森尼自然历史博物馆中。gwendel是石英的一种，其化学式为SiO₂。左侧的样本宽约20厘米，来自瑞士Uri地区的Furka的Tiefengletscher。
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This sample is also from Uri, Switzerland. It is about 6 x 12 cm. 这个样本也来自瑞士的Uri地区。它的尺寸大约是6 x 12厘米。
Gwendel (sometimes spelled gwindel) implies twisted quartz crystals. They are almost always smoky in color, and are prized by collectors. Gwendel（有时拼作gwindel）指扭结的石英晶体。它们几乎总是呈烟灰色，因此受到收藏家的青睐。
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Mindat: Gwendel Quartz
Mindat: Gwendel 石英
| Minerals
矿物 |
索引
| HyperPhysics*****Geophysics
HyperPhysics ***** 地球物理学 | R Nave |
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