Agate is the banded form of Chalcedony (also spelt Calcedony, it is the catch all term for cryptocrystalline Quartz) and its name was derived from the site of its discovery, the river Achates in southwest Sicily.

瑪瑙是一種纖維狀玉髓晶體（英語也拼寫為 Calcedony 最新黄视频网站，為隱晶石英的統(tǒng)稱）国产精品国产AV永久入口久久久。英文名源于發(fā)現(xiàn)地-西西里西南部埃格特茲河。

Agate is a variety of chalcedony that comes in most colors.

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Theresults indicated that the aggregates in this experiment are all argillaceous carbonate rockscontained alkali reactive minerals such as chalcedony and dolomite.

結(jié)果表明亚洲可以免费在线观看的黄色网址，三種骨料樣品均為粘土質(zhì)碳酸鹽福利精品一区，含有玉髓和白云石等堿活性礦物欧美性爱大战，具備AAR 發(fā)生的巖相特征。

But make no mistake, Aventurine is certainly not glass, it is actually a much sought after member of the Chalcedony Quartz family.

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Aventurine is a Chalcedony that contains small inclusions of one of several shiny minerals which give the gem a glistening effect.

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Opals, chalcedony, cat's-eyes, star sapphires, laps, coral, turquoise, and other gems with rich deep colour are often cut in the smooth dome shape called the cabochon, the favorite shape of the ancient world, which emphasizes colour over brilliance.

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The variety of chalcedony includes moonlight stone, green chalcedony, red agate, pinkish red chalcedony, bloodstone, mother emerald, agate, onyx, jade, drak green chalcedony, chrysocolla, silicified wood.

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Chrysoprase, a bright apple green translucent chalcedony, is the most valued variety of chalcedony.

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Blue chaleedony is one of the most precious gemstones in Taiwan, The most popular imitations of blue chalcedony in Taiwan market are dyed chalcedony, dyed quartzite and blue opal.

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