水晶表面坑洼的地方，有的深，有的浅，这是水晶在成长过程中自然形成的，并非是人为造成的损伤。缺陷位置本来包有其他矿物晶体，由于包裹体和水晶结合部位的结合力不强，当表面抛光时，矿体脱落，留下空位。这种缺陷在绿幽灵、钛晶、金发晶上都比较常见。
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。
水晶文化历史悠久，古人曾赋予它一串极富美感的雅称：水玉、水精、水碧、石英等。
Fig. seven: A template-directed approach can Handle The location of creating blocks with a surface while in the formation of advanced structures.
这种水晶观赏石特指水晶晶簇，它是众多单晶体集中生长在一起的晶体组合。晶簇以其晶莹剔透、独特造型而享誉水晶赏石界。
Not all crystals form in drinking water, but nearly all crystals sort a similar way, atoms occur alongside one another and turn into a uniformed cluster. The process usually takes as little as a few days to it's possible a thousand years. Natural crystals that originate from the Earth type the identical way.
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�?
Hexagonal �?Characterized by four axes, 3 of which can be equal in length and intersect at a hundred and twenty levels, having a fourth axis perpendicular to the opposite a few.
Many crystals behave like butter in that they are challenging at very low temperatures but tender at better temperatures. They're named solids at all temperatures down below their melting issue. A doable definition of a stable is really an item that retains click here its shape if left undisturbed. The pertinent difficulty is how much time the object keeps its shape. A hugely viscous fluid retains its shape for an hour or so although not a yr. A sound must hold its condition for a longer period than that.
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用手去触摸水晶，天然水晶通常温度要比人造水晶的要凉的多；用眼观察，天然水晶通常有棉絮状的包裹体，这个是人造水晶所没有的。
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。
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。
Binary crystals are found in quite a few buildings. Some pairs of features type multiple framework. At room temperature, cadmium sulfide could crystallize possibly within the zinc blende or wurtzite construction. Alumina also has two achievable buildings at area temperature, α-alumina (corundum) and β-alumina. Other binary crystals exhibit unique structures at unique temperatures. Amongst the most sophisticated crystals are All those of silicon dioxide (SiO2), that has 7 various structures at different temperatures and pressures; the most typical of such structures is quartz.