Not known Factual Statements About Crystal

Not known Factual Statements About Crystal

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Not all crystals are Similarly crystalline. There will often be impurities, and also the ionic & covalent amongst molecules can produce vastly different structures away from exactly the same substance. An incredible illustration of this are diamonds and graphene.

杂质、裂纹越少越好。质地好的水晶制品，应看不到星点状、云雾状和絮状分布的气液包裹体或组成玉石的颗粒。有裂纹、斑点，则属于次品。

对水晶进行评价主要依据其颜色、透明度、大小、净度、特殊图案及是否有光学效应等方面。以颜色纯正，浓度较高，内部无瑕为好。种类上紫晶最贵，其次为黄晶、烟晶、无色水晶和芙蓉石。有特殊光学效应的水晶的价格更高。

第一种是“全包裹体”，在水晶结晶的时候把这些物质包裹在晶体里面，这类包裹体所形成的各种景象，大多保持了水晶结晶时的原状，也就是说保存了几亿年的原状，极少受到自然环境的影响。

25If you are a Billy Crystal lover, you'll like this movie.如果你是比利·克里斯特尔的影迷，你就会喜欢这部电影。《柯林斯英汉双解大词典》

, has the exact same structure, but There's two choices for selecting the holes that the atoms will occupy. The third layer is usually positioned about the atoms of the initial layer, creating an alternate layer sequence A

根据包裹体和主晶宝石之间形成的先后关系可将水晶的包裹体划分以下三种类�?

损伤是指水晶由于加工或不小心摔掉、碰撞等原因，人为造成的损坏。它可以是破口，也可以是凹坑等。

本词条由中国科学院大学地球与行星科学学院、中国科学院地质与地球物理研究所 参与编辑并审核，经科普中国·科学百科认�?。

[ C/U ] clear glass of top of the range, usually with its surface area website Slash into patterns that mirror gentle

天然性是水晶观赏石的基本特性。通常整体造型水晶矿物不饰雕琢就具备很高的观赏价值，但是包裹体水晶观赏石经常需要适当打磨抛光，这样更方便观赏水晶内部的包裹体。

There are only some diverse device-mobile designs, so many different crystals share one device-mobile type. A vital attribute of a device mobile is the volume of atoms it consists of. The whole amount of atoms in the complete crystal would be the selection in each cell multiplied by the number of device cells. Copper and aluminum (Al) Every have just one atom for every device cell, while zinc (Zn) and sodium chloride have two. Most crystals have only a few atoms for every device mobile, but there are numerous exceptions. Crystals of polymers, for instance, have Many atoms in Just about every unit mobile.

14For case in point, We now have Quartz crystal clocks and watches exact to inside just one moment a 12 months.例如，我们使用的每年误差不超过one分钟的石英水晶钟表和手表。

⑥白色的包裹体有蚀变的绿泥石、云母、愈合裂隙、水晶、方解石、透闪石等。