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。
①压电效�?在机械力(压力或拉�?作用下，水晶单晶体的两端会产生电荷，其电量相等但符号相反。在工业上，无色、无缺陷、不具双晶的水晶常被用来作压电石英片。
一般而言，紫晶和黄晶是水晶中价值较高的品种。两者进一步的分级是据其颜色的深浅，颜色较深的为A级，稍浅的为B级。一般颜色较深的价格高，但要以不深暗为标准。颜色包括两种，一种是水晶本身的颜色，另一种是内部包裹体的颜色。水晶本身的颜色要艳丽、纯正，分布要均匀，不能太深或太浅，如澳州玉、蓝玉髓、紫晶、黄水晶，其价格就高。无色的水晶内含包裹体的颜色艳丽，其价格也高，如钛晶、绿幽灵、红兔毛。紫水晶一般以稍有云状物、颜色深紫、晶体通透的为上品。
看原料：选料精良的水晶制品，应看不到胶口及棉絮；质地纯净、光润、晶莹为好。
断口：贝壳状。断口也叫破口。它是指矿物被打击后产生不规则的破裂，破裂裂面凹凸不平称为断口。根据断口的形状可分为贝壳状和锯齿状。
无色水晶与无色长石因折射率和密度十分接近故较难区分。主要方法是放大检查。长石有两组极完全解理，显微镜下可见两组解理相交而成的“娱蛤状”包裹体或细直的纹理，而水晶则无解理发育，仅有时可见断续不规则的裂理。
解理：无解理。所谓解理是指矿物被打击时，沿一定方向有规则地裂开形成光滑平面的性质。根据解理的程度可以分为五类：极完全解理、完全解理、中等解理、不完全解理和无解理，水晶属于无解理。
②固体包裹体：指呈固态相存在包裹体，多因岩浆、热液、变质作用等形成的早期结晶物被水晶捕获而形成。
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多色�?无色水晶没有多色性。有色水晶有弱到强的多色�?表现为体色的不同深浅。
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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。
The structure of the sodium atoms alone, or the chlorine atoms by yourself, is fcc and defines the unit cell. The sodium chloride framework So is created up of two interpenetrating fcc lattices. The cesium chloride lattice (Figure 3A) relies to the bcc structure; every single other atom is cesium or chlorine. In this case, the device cell is a cube. The 3rd crucial construction for AB
crystal Alteration is variable: absent in many crystals, in Other individuals developing dense sericite aggregates which may clearly show some recrystallization effects to create coarser-grained white mica. With the Cambridge English Corpus The tridymite crystals are rectangular or wedge-formed and are occasionally organized in aggregates. Through the Cambridge English Corpus Moreover, haloarchaeal cells ended up embedded inside of salt crystals beneath laboratory situations and subsequently analysed by mild microscopy. In the Cambridge English Corpus The white clouds (commonly sparse) have been also extensively viewed as being composed of small crystals of h2o ice, somewhat like cirrus in our atmosphere. Within the Cambridge English Corpus These are located in evaporite salt lakes and can be trapped in salt crystals through evaporation. In the Cambridge English Corpus As a result, the cells (organelles and membranes) are ruined mechanically by ice crystals, leading to Dying by way of cell lysis. With the Cambridge English Corpus The crystals were being used in the 1st or next orders of reflection. From the Cambridge English Corpus In our 8xperiments, the crystals ended up cubes using a base location of eight e mm. check here From the Cambridge English Corpus Vibration-assisted intermolecular hydrogen tunneling in photoreactive doped molecular crystals : result of temperature and strain.