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| 11. | in many different types of rocks, including sandstone and granite.Varieties of quartz include agate, chalcedony |
| 石英由硅石组成的一种非常坚硬的矿物质，SiO2，广布世界各地，存在于许多不同种类的岩石中，包括沙岩和花岗岩。石英种类包括玛瑙、玉髓、黑矽石、燧石、蛋白石及水晶 |
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| 12. | any of various gems (as chrysoberyl or chalcedony) that reflect light when cut in a rounded shape. |
| 切成圆形后能反射光线的各种宝石（如金绿石或玉髓）。 |
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| 13. | a hard kind of stone; a form of silica more opaque than chalcedony. |
| 一种硬石，硅石的一种形式，透明度不如玉髓。 |
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| 14. | A pale to deep red or reddish-brown variety of clear chalcedony, used in jewelry. |
| 光玉髓，红玉髓明净的玉髓的一种浅色至深红或红棕色的变体，用于制珠宝 |
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| 15. | North America from about12, 000to9, 000b.c., distinguished by sharp, fluted projectile points made of chalcedony |
| 克洛维斯的大约公元前12，000至9，000年在北美洲广泛传播的史前人类文化的，或与之相关的，以玉髓或黑曜石制成的锋利且有凹槽的投掷用尖器为特色 |
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| 16. | a chalcedony with alternating black and white bands; used in making cameos. |
| 黑白带纹相交的玉髓，用作浮雕宝石。 |
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| 17. | A chalcedony that occurs in bands of different colors and is used as a gemstone, especially in cameos |
| 缟玛瑙一种带有条纹和多种颜色的玉髓，它被用来作饰物的宝石，常用于浮雕和凹雕 |
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| 18. | an impure form of quartz consisting of banded chalcedony; used as a gemstone and for making mortars and |
| 一种不纯的石英，由带纹玉髓构成，用作宝石及制作研钵和杵。 |
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| 19. | A fine-grained, fibrous variety of chalcedony with colored bands or irregular clouding. |
| 玛瑙颗粒均匀的纤维状玉髓的多种形式，具有彩色的条带或者不规则的云状花纹 |
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