Onyx Quartz
onyx石英
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Quartz is silicon dioxide, SiO2. Quartz is abundant in the Earth's crust, being the chemically simplest form of the silicates. All the samples here are displayed in the Smithsonian Museum of Natural History. One of the distinctive varieties of quartz is called onyx. The samples at right have a maximum dimension of about 3.5 cm and are from Brazil. 石英是二氧化硅，SiO₂。石英在地壳中很丰富，是硅酸盐中化学最简单的形式。这里的所有样品均陈列在史密森尼自然历史博物馆中。石英的一种显著变种称为黑曜石。右边的样品最大尺寸约为3.5厘米，来自巴西。
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Sardonyx Quartz
萨多尼克斯石英
 | These are examples of sardonyx quartz from Brazil. The largest is about 2x2.5 cm.
这些是来自巴西的砂岩石英例子。最大的大约是2x2.5厘米。 |
This sample is also from Brazil. Its dimensions are about 3x2.5 cm. 这个样本也来自巴西。其尺寸约为3x2.5厘米。
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Bloodstone Quartz
血石石英
 | These example of bloodstone is from India and measures about 3x3 cm.
这些血石来自印度，尺寸约为3x3厘米。 |
Chrysoprase Quartz
绿松石石英
This sample is from Marlborough mine, Queensland, Australia. Its dimensions are about 11x13 cm. 这块样本来自澳大利亚昆士兰的马尔伯勒矿。其尺寸约为11厘米×13厘米。
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Flint Quartz
Flint Quartz（矿物名）
 | This example of flint is from Gravesend, England and measures about 4x4 cm.
这种燧石来自英格兰格雷夫森德，尺寸约为4x4厘米。 |
| Minerals
矿物 |
索引
| HyperPhysics***** Geophysics
HyperPhysics ***** 地球物理学 | R Nave |
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