The 5-Second Trick For Crystal
The 5-Second Trick For Crystal
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27Local economists have looked into their crystal balls and observed something fairly nasty.当地的经济学者们已预测到将会出现棘手的问题。《柯林斯英汉双解大词典》
Bismuth (Bi) seems to become a metal, but the number of electrons obtainable for electrical conduction is comparable to that of semiconductors. The truth is, bismuth is known as a semimetal. Molecular solids are generally crystals fashioned from molecules or polymers. They may be insulating, semiconducting, or metallic, dependant upon the sort of molecules inside the crystal. New molecules are continuously remaining synthesized, and many are created into crystals. The amount of diverse crystals is gigantic.
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。
We've created about around three hundred stones while in the mineral kingdom! Read about Just about every stone's one of a kind origin, heritage, and energies under.
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。
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。
⑩、雷射内雕：以计算机辅助激光设备在水晶对象中进行三维图案的成型，艺术效果好，可以任意表达各类图案，图形，达到逼真效果
11I diligently opened the package deal and located a crystal bell inside.我小心地打开包裹，发现里面有一个水晶钟。
仿制钛晶树水晶：钛晶是水晶里价格最昂贵的，造假者当然也不会放过这么好的产品。天然的环境下，在水晶里能生长个像树一样的钛晶，完全是可能的，只是这样的货很少，那我们的造假专家是如何做的呢，白水晶底下打个洞，激光打点成板状的钛晶进去，就这样这块水晶的身价就能飙升几十倍。往往有的钛晶戒面，会采用将钛晶部位割成板状，与圆面的水晶粘合的方法来制作。
A crystal method refers back to the classification of click here crystals determined by the geometric arrangement and symmetry in their lattice structures. You'll find seven major crystal techniques:
地质学家目前为止对晶洞形成还没有广泛认同的理论，但相信晶洞可以在任何埋藏的空腔内形成。这些空腔可以是火成岩中的气泡、树根下的空穴，甚至动物挖的地洞。经过漫长时间，空腔的外壁变硬，溶解的矽酸盐或方解石沉积到内壁。再经过漫长的时间，缓慢渗入的矿物使得晶体在空腔内部结晶。
Crystallography may be the research of crystals, and it bargains with all the things from best geometric designs to seemingly random conglomerations of particles and minerals.
Crystals are categorized generally categories, like insulators, metals, semiconductors, and molecular solids. One crystal of an insulator is often clear and resembles a piece of glass. Metals are shiny Except they've rusted. Semiconductors are sometimes shiny and occasionally transparent but are never ever rusty. Lots of crystals is usually categorised as only one form of reliable, while some have intermediate conduct. Cadmium sulfide (CdS) is often geared up in pure sort and is a superb insulator; when impurities are extra to cadmium sulfide, it gets an interesting semiconductor.
水晶的价值根据品质、块体的大小、美感和产量多少的不同相差较大。遇到好的天然水晶要敢于下手，但好的水晶一般大家都想得到，值与不值，就要看经验了。由于天然水晶的开采和制作原因，没有瑕疵的水晶很难得到，纯净的饰品要达到与合成水晶媲美的品质，实在是很难得。另外，由于水晶的特性，在佩戴过程中，也会改变其等级，比如因为某种原因，有可能会逐渐产生较大裂纹。