He fondled them in his palm as if they were something more valuable than pearls or agates.
他当年那股调皮劲显然还没改。
单词 | agate | ||||||||||||||||||||||||||||||||||||||
释义 |
agate
|
玛瑙 | |
---|---|
瑞士洛桑出产的玛瑙 | |
基本数据 | |
类别 | 石英变体 |
化学式 | 二氧化硅(SiO2) |
性质 | |
颜色 | 白色至灰色、浅蓝、橙色至红色、黑色或具有色带 |
晶体惯态 | 隐晶质石英 |
晶系 | 三方微晶 |
解理 | 无 |
断口 | 具有锋利边缘的贝壳状 |
硬度 | 6.5-7 |
光泽 | 蜡状 |
条痕 | 白 |
透明性 | 不透明 |
比重 | 2.58-2.64 |
折射率 | 1.530-1.540 |
双折射 | 可达 +0.004 (B-G) |
多色性 | 无 |
玛瑙是石英的一种隐晶质变体,其特征是质地细腻且色彩鲜艳。尽管玛瑙在各种岩石中均有出现,它通常被认为和喷出岩共生,且在变质岩中常见。
Agate /ˈæɡət/ is a cryptocrystalline variety of silica, chiefly chalcedony, characterised by its fineness of grain and brightness of color. Although agates may be found in various kinds of rock, they are classically associated with volcanic rocks and can be common in certain metamorphic rocks.
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