Calcite crystals are often Employed in optical equipment, and perhaps the graphite in pencil direct are sheets of crystals that essentially split aside layer by layer to put in writing. Silica can type silicate crystals which might be The idea for quartz, mica, olivine, and all kinds of other crystals and minerals.
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。
景观水晶，就是包裹体组成各种造型特异的水晶，有的似山水，有的似人物，有些像文字，有些像动物，植物，器物等等。
If you wish to see how crystals are shaped, it is possible to perform a little task in your really very own kitchen area and find out the development of your crystals take place along with your very own eyes . This can be done by Placing a small amount of desk salt into some typical faucet h2o, hold out 24 hours, and you'll see good cubed formations. This comes about as the h2o is evaporating, which will cause the atoms that make up the salt (the mineral) as well as water to come nearer together.
《全唐诗》卷七八五载《白雪歌》：“鸟啄冰潭玉镜开，风敲檐溜水晶折。”
⑧、雕刻：立体感强，工艺高，做工精细，成本高。分手工雕刻图形、机器雕刻文字。
水晶原石观赏石，从字面意义理解：观赏水晶石的原貌，即经过抛光去皮后的包裹体水晶和原色水晶，不需雕刻不求象形就具有非常高的观赏价值和收藏价值。此类水晶观赏石对质地要求非常之高，水晶晶体通透干净，颜色艳丽，意境鲜明深刻的价值就高，它的价值特点就好比钻石，实实在在石头本身的价值。
For a incredibly hot Answer cools or simply a saturated Option evaporates, particles attract close plenty of for chemical bonds to type. Crystals might also sort from deposition straight from the gas section. Liquid crystals have particles oriented in an organized way, like good crystals, nevertheless are able to flow.
Among the many binary crystals, the easiest structures to visualize are These with equivalent figures of the two forms of atoms. The framework of sodium chloride is based over a dice. To assemble the lattice, the sodium and chlorine atoms are placed on alternate corners of the cube, along with the framework is recurring (Determine 3B).
crystal The freshly crystallized quartz grains are characterized by elongate crystals oriented oblique into the shear band margins, defining a typical grain-condition foliation. 来自 Cambridge English Corpus We are saying the chain topology from the large w location acts as the proverbial ' scratch-on-theglass ' wanted within the natural and organic website chemistry laboratory to generate crystals. 来自 Cambridge English Corpus The age scatter amongst the person crystals may well reflect incorporation of xenocrysts from previously magmatic pulses or protoliths. 来自 Cambridge English Corpus The clinopyroxene sorts neutral to pale brown, subhedral to anhedral crystals, from time to time made up of inclusions of plagioclase microlaths and opaque phases.
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。
14For illustration, Now we have Quartz crystal clocks and watches exact to in just one minute a 12 months.例如，我们使用的每年误差不超过1分钟的石英水晶钟表和手表。
对于紫水晶黄水晶这样的单色水晶，通常要观察它的二色性，即使是最顶级的紫水晶黄水晶也是有色差的，通过这个方法可以鉴别是否加色。