Not all crystals are equally crystalline. There are sometimes impurities, along with the ionic & covalent among molecules can create vastly unique structures out of precisely the same materials. An awesome illustration of this are diamonds and graphene.
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。
结晶的形状非常细小，需要用显微镜才能看得清楚，外观上看起来是平滑、块状。常见最多的是各式玛瑙
看原料：选料精良的水晶制品，应看不到胶口及棉絮；质地纯净、光润、晶莹为好。
Fig. four: Setting up blocks with distinctive shapes and area chemistries direct the development of unique crystal symmetries.
Sensible Vocabulary: linked words and phrases Glass blower blowpipe bulletproof glass Minimize glass fibreglass frosted glassware glaze glazed glazier glazing prism prismatic punty Pyrex reglaze unglazed vitreous vitrification vitrify See much more effects » You can even find relevant words and phrases, phrases, and synonyms during the subjects:
Crystals search exclusive from all kinds of other rocks and minerals, but �?barring a couple of Exclusive instances �?nearly all minerals cover a crystalline structure beneath the surface area.
Crystals are absolutely nothing over an purchased arrangement of molecules or atoms. Crystals can be found in numerous styles and sizes, and every one has diverse qualities. What they are created of decides how it will kind.
水晶是有成色等级之分，影响水晶价位的因素很多，不像钻石以4C就可以判定，所以大家要多听多看多比较才能真正辨别出来。一般的标准是水晶石越大越好，越透越好，颜色越娇嫩越好，形状越典型越好。不过最重要还是自己喜欢，而选购时辨识真伪的方法大致有下列几种：
英语-中文（简体） term #beta Beta /beta #preferredDictionaries ^selected name /selected /preferredDictionaries
There's two these kinds of possible periodic preparations. In Each individual, the first layer has the atoms packed right into a airplane-triangular lattice in which each atom has 6 speedy neighbours. Determine 2 displays this arrangement for your atoms labeled A
隐晶类水晶外观是一块块的，不是成六角水晶簇状，但他们却也是属六方晶系的。但我们不能以肉眼观察到他们的六角形结晶，因为结晶的体积极为细小，需以显微镜协助下才能看到六角开结晶。而此类水晶非常平滑，因为结晶之间有“水化硅石”填补，玛瑙便属于此类。
⑨、喷砂：立体感弱，较平整，无凹凸感，机器雕刻文字、图形等后进行效果处理。成本低制作快。
21You all know the way if you have a crystal prism and move a beam of sunlight by way of it, you have a spectrum, which seems website like a steady band of rainbow shades.