A solid is crystalline if it's very long-vary buy. When the positions of the atom and its neighbours are recognised at one stage, the place of each atom is understood exactly all over the crystal. Most liquids deficiency extensive-vary order, Even though numerous have quick-array purchase. Limited array is defined as the initial- or next-nearest neighbours of an atom. In lots of liquids the first-neighbour atoms are arranged in exactly the same construction as while in the corresponding stable period.
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。
水碧：《山海经》中，水晶又被称作水碧： �?又南三百里，日耿山，无草木，多水碧 �?，郭璞注�?�?亦水玉类 ”。这种称谓常被文人所引用，晋代郭景纯《璞江赋》道�?�?鬼，水碧�?�?。水晶又有人称它叫玉瑛。《符瑞图》载�?美石似玉，水精谓之玉瑛也�?”
2She was putting on a strand of crystal beads.她戴着一串水晶珠子。《柯林斯英汉双解大词典》
结晶�?When sea water is allowed to evaporate, salt crystals are deposited. 海水蒸发后，盐的结晶体就沉淀下来。
水晶的评价标准和高端宝石有所不同。多数高端宝石把颜色放在评价的第一位，而对水晶来说，颜色和净度（水晶行业称作晶体）是近乎同等重要的因素：
如果水晶内部杂质中有传说中人物的造型，如佛、星座、生肖等价值可能要高于同等颜色和净度的水晶。
水晶包裹体丰富多彩，从气体、液体到各种矿物质，甚至宝石，均可被包含于水晶内，各种包裹体所形成的景象更是变化万千。按照包裹体的内容，常把包裹体水晶分为一下八类：
crystal The freshly crystallized quartz grains are characterized by elongate crystals oriented oblique to your shear band margins, defining a normal grain-condition foliation. 来自 Cambridge English Corpus We are saying the chain topology in the higher w location functions because the proverbial ' scratch-on-theglass ' wanted during the organic chemistry laboratory to produce crystals. 来自 Cambridge English Corpus The age scatter between the individual crystals may perhaps replicate incorporation of xenocrysts from previously magmatic pulses or protoliths. 来自 Cambridge English Corpus The clinopyroxene types neutral to pale brown, subhedral more info to anhedral crystals, from time to time containing inclusions of plagioclase microlaths and opaque phases.
say cheese a thing that someone who is having a photograph of you informs you to state so that your mouth will make the shape of the smile
The sodium chloride crystal lattice is characterized via the close packing on the favourable sodium ions and unfavorable chloride ions. Every single sodium ion is surrounded by six chloride ions, and every chloride ion is surrounded by six sodium ions, creating a hugely stable and symmetrical construction.
水玉：中国最古老的称法叫水玉，意谓似水之玉，又说是 �?千年之冰所�?�?。唐代诗人温庭筠《题李处士幽居》写道：�?水玉簪头白角巾，瑶琴寂历拂轻�?”。水玉一词最早频繁出于《山海经》：�?又东三百里，日堂庭之�?…�?多水�?”；�?丹山出焉，东南流注于洛水，其中多水玉 ”；�?逐水出焉，北流注于渭，其中多水玉 ”。司马相如《上林赋》曰�?�?水玉磊河 �?。水晶得名水玉，古人是看�?�?其莹如水，其坚如�?�?的质地。
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。