Earth and the Environment

What are the varieties of chalcedony?

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Colored varieties of chalcedony known by special names are carnelian , sard, chrysoprase, agate , onyx , sardonyx, and jasper .

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Magazine article from: Jewelers Circular Keystone Chalcedony is a natural microcrystalline...some of its better-known varieties are carnelian, sard, bloodstone...agate. Common translucent chalcedony occurs in a wide range of...blues and lavenders. With chalcedony's recent popularity...
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Magazine article from: World and I ...the most beautiful varieties of quartz are chrysoprase...Chrysoprase, a rare variety, is bright green due...yellow or pale brown variety called citrine also...submicroscopic crystals known as chalcedony are also common. These...itself can take on a variety of forms, such as...also given to ...
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