轴性、光性：一轴晶正光性。正交偏光下所看到的一轴晶干涉图是独特的，其黑十字臂未达中心，形成中空的图案，俗称牛眼干涉图。中心部分通常为淡绿色或淡粉色。
按照透明度指标，水晶越透明，价格越高，好的透明的水晶加工出的成品晶莹剔透、光辉耀眼。透明度高的水晶能提升颜色的艳丽，否则显得呆板无灵性。光学水晶要求全透明、无双晶、无杂质。工艺水晶要求透明、少裂、少瑕疵。熔炼水晶要求透明，可有较多裂纹。三者价值依次降低，熔炼水晶只能作为熔炼水晶玻璃的原料。在工艺水晶中，晶体较大的，可用来做水晶眼镜和雕刻高档工艺品，因而价格较高。
A crystal construction concentrates on how the atoms are arranged inside the crystal. Having said that, crystallographers are interested in the overall shape and sizing of the crystal along with its external features. To accomplish this, they should understand about the crystal procedure.
Insert to word listing Add to phrase checklist C2 [ U ] transparent glass of very high quality, typically with its surface area Slice into sensitive patterns
C2 [ U ] transparent glass of really good quality, typically with its surface Reduce into fragile designs:
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Ionic Crystals: Electrostatic forces type ionic bonds. A typical instance is usually a halite or salt crystal.
24I want to make my which means crystal very clear.我想把我的意思解释得清清楚楚。《牛津词典》
say cheese something that here somebody that is having a photograph of you informs you to state so that your mouth would make the shape of the smile
. The 2nd layer is shaded in the figure. It's the same aircraft-triangular structure; the atoms sit while in the holes fashioned by the primary layer. The primary layer has two equal sets of holes, however the atoms of the next layer can occupy just one established. The 3rd layer, labeled C
国家还并未给天然水晶提供一个等级划分的具体标准，水晶品种繁杂，每一品种都有他不同的评判标准。
crystal, any good product by which the part atoms are organized in a very definite pattern and whose floor regularity demonstrates its interior symmetry.
水晶观赏石在形态、质地、内部特征等方面往往十分奇异。大自然有无限风光，都可以在包裹体水晶种找到缩影。