| 11. | The mine also bore other minerals including chalcedony, opal, and pyrite.
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| 12. | Chrome chalcedony ( unlike chrysoprase ) may also contain tiny black specks of chromite.
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| 13. | Other blue-colored stones such as chalcedony and lapis are also growing in popularity.
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| 14. | Dyed chalcedony, jasper, and marble is less common, and much less convincing.
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| 15. | Among petrologists, chalcedony is sometimes considered separately from chert due to its fibrous structure.
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| 16. | The hills around Sana'a were mined for onyx, chalcedony, and cornelian.
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| 17. | :This site has one made of chalcedony from the Ethnologisches Museum ( berlin ).
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| 18. | It is decorated with enameled ladybugs that sit on diamond-studded, carved chalcedony daisies.
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| 19. | Other source materials include chalcedony, quartzite, andesite, sandstone, chert, and shale.
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| 20. | The " classic " bloodstone is green jasper ( chalcedony ) with red inclusions of hematite.
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