Not all crystals are Similarly crystalline. There are sometimes impurities, plus the ionic & covalent between molecules can build vastly diverse structures from precisely the same materials. A great illustration of this are diamonds and graphene.
23Sometimes, having said that, the crystal form of the silicate inclusions is observed to resemble extra closely The inner structure of diamond than that of other silicate minerals.然而，有时观察到硅酸盐包裹体的晶体形态比其他硅酸盐矿物更接近金刚石的内部结构。
Chemical Bonds The types of chemical bonds formed among atoms or teams of atoms in crystals depend on their measurement and electronegativity. There are actually four categories of crystals as grouped by their bonding:
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。
断口：贝壳状。断口也叫破口。它是指矿物被打击后产生不规则的破裂，破裂裂面凹凸不平称为断口。根据断口的形状可分为贝壳状和锯齿状。
Not all crystals kind in drinking water, but nearly all crystals variety precisely the same way, atoms occur jointly and turn into a uniformed cluster. The process may take as small as a couple of days to it's possible a thousand decades. Pure crystals that originate from the Earth form precisely the same way.
对任何宝石来说，颜色都是非常重要的，水晶也不例外。如果是水晶晶体是有颜色的，如粉水晶、黄水晶、紫水晶等，其颜色评价的最高标准则是明艳动人，不带有灰色、黑色、褐色等其他色调。如粉水晶，颜色以粉红为佳；紫水晶，要求颜色为鲜紫，纯净不发黑；黄水晶，要求颜色不含绿色、柠檬色调，以金橘色为佳。对于发晶来说，晶体的颜色也是很重要的。相同发丝的金发晶，晶体完全无色（白水晶）和晶体略偏茶色，肉眼的视觉观感也是有差别的，所以前者的价格会高于后者。
26Some of the finest ingesting Eyeglasses are made from lead crystal.一些最精致的酒杯是用铅晶质玻璃制成的。《柯林斯英汉双解大词典》
本词条由中国科学院大学地球与行星科学学院、中国科学院地质与地球物理研究所 参与编辑并审核，经科普中国·科学百科认�?。
[ C/U ] clear glass of top quality, ordinarily with its floor Reduce into patterns that replicate light-weight
. The second layer is shaded within the figure. It has exactly the same airplane-triangular structure; the atoms sit in the click here holes formed by the initial layer. The 1st layer has two equal sets of holes, but the atoms of the second layer can occupy just one established. The third layer, labeled C
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。
在透明的水晶中，隐裂纹呈亮晶晶的片状，有时还会有晕彩效应。这些裂纹是水晶在生长过程中，遇到外力挤压而在内部产生的一些隐形裂纹，隐裂纹在芙蓉石、紫水晶、白水晶球及白水晶柱中都很常见。有的裂纹后来被物质填充，形成愈合的裂纹，也就是原来的裂纹又长住了。这种裂纹对水晶的影响相对要小一些。
21You all know the way once you take a crystal prism and move a beam of sunlight by it, you will get a spectrum, which looks like a continual band of rainbow hues.