大部分用作宝石的钻石来自南非。
锆石是一种可用作宝石的矿物。
Zircon is one of the minerals which can be used as gemstones.
一种绿色的金绿宝石，用作宝石。
一种绿色的金绿宝石，用作宝石。
绿玉的一种，用作宝石。
黑玉，贝褐炭：一种用作宝石的很亮的深黑色碳物质。
A dense black coal that takes a high polish and is used for jewelry.
变石，紫翠玉一种淡绿色的金绿宝石，在人工灯光下呈红色，用作宝石。
A greenish chrysoberyl that appears red in artificial light used as a gemstone.
天河石，绿长石一种绿色微斜长石，常用作半宝石。
A green variety of microcline, often used as a semiprecious stone.
具有高纯度，是制造立方氧化锆晶体(人造宝石)的主要原材料，也用作高折射光学玻璃和光学纤维的添加剂。
SCP-ZrO2 (gem-grade zirconia) has high purity and is mainly used for making cubic zirconia crystal (artificial gems), and as additive for optical glass and fibre with high index of refraction.
因此本文结合氧化硅与氧化钇的优点把两者用作红外增透薄膜对蓝宝石进行表面改性以提高其红外透过率。
This paper takes advantage of silicon dioxide thin film and yttrium oxide for surface modification to increase the infrared transmittance of sapphire.
因此本文结合氧化硅与氧化钇的优点把两者用作红外增透薄膜对蓝宝石进行表面改性以提高其红外透过率。
This paper takes advantage of silicon dioxide thin film and yttrium oxide for surface modification to increase the infrared transmittance of sapphire.
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