Not all crystals are Similarly crystalline. There are frequently impurities, as well as ionic & covalent in between molecules can build vastly distinct buildings out of the same materials. An excellent example of this are diamonds and graphene.
无色水晶以晶莹美丽、洁净透明着称。衡量无色水晶主要看它的纯度，越纯、越透明越好。干净的、无瑕疵的、杂质少的价值就高。无色的水晶如果很脏，就没有利用价值。
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。
养殖晶：养殖晶是指，用天然水晶做种子，然后赋予天然水晶生长的高压条件，养殖器中有富含二氧化硅的分子。然后二氧化硅分子围绕天然水晶种生长，这样的水晶成分（分子式）与天然水晶是一摸一样的，唯一有差别的是，这样的水晶磁场作用没有天然水晶强。
Additionally, there are many resources that resemble crystals but are actually polycrystals. Polycrystals sort when microscopic crystals fuse with each other to sort a sound. These components tend not to include purchased lattices.
你们都知道，拿起一个水晶棱镜，让一束阳光通过它，就会得到一个光谱，看起来就像一条连续的彩虹色带。
解理：无解理。所谓解理是指矿物被打击时，沿一定方向有规则地裂开形成光滑平面的性质。根据解理的程度可以分为五类：极完全解理、完全解理、中等解理、不完全解理和无解理，水晶属于无解理。
发晶：无色、浅黄、浅褐等，可因含金红石常呈金黄、褐红等色，含电气石常呈灰黑色；含阳起石而呈灰绿色。
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Crystals with clear flat faces are identified as euhedral crystals, although People lacking outlined faces are termed anhedral crystals. Crystals consisting of requested arrays of atoms that are not usually periodic are referred to as quasicrystals.
看孔眼：对于缀穿水晶制品（如项链、手链、佛珠），要看孔眼是否平直，孔的粗细是否均匀，有无细小裂纹。孔壁必须清澈透明，无“白痕”。
The sodium chloride crystal lattice is characterized by the close packing of your constructive sodium ions and adverse chloride ions. Just about every sodium ion is surrounded by six more info chloride ions, and each chloride ion is surrounded by 6 sodium ions, making a remarkably secure and symmetrical construction.
This Assessment chronicles around 20 years of investigation into making a genetic code for crystal engineering. Instead of directing Organic procedures, this code utilizes artificial types of DNA to programme the assembly of nanoparticles and microparticles into 1D, 2nd and 3D crystalline architectures, in which just about each aspect of the resultant constructions may be systematically controlled. Within this conceptual framework, the structural and practical developments are described in an effort to outline the existing volume of sophistication also to forecast long term directions of your System.
This crystal framework is liable for the one of a kind physical and chemical Houses of sodium chloride, which includes its significant melting stage, electrical conductivity, and skill to form ionic bonds effortlessly.