Crystal Secrets
Crystal Secrets
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看颜色：即使在同一种类的水晶中，它的不同部位的纹理、色泽也各式各有千秋。属于单色的，要色度均匀；在同一块水晶上有深浅的，则要求其色调纹路美观大方。
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一般而言，紫晶和黄晶是水晶中价值较高的品种。两者进一步的分级是据其颜色的深浅，颜色较深的为A级，稍浅的为B级。一般颜色较深的价格高，但要以不深暗为标准。颜色包括两种，一种是水晶本身的颜色，另一种是内部包裹体的颜色。水晶本身的颜色要艳丽、纯正，分布要均匀，不能太深或太浅，如澳州玉、蓝玉髓、紫晶、黄水晶，其价格就高。无色的水晶内含包裹体的颜色艳丽，其价格也高，如钛晶、绿幽灵、红兔毛。紫水晶一般以稍有云状物、颜色深紫、晶体通透的为上品。
Fig. three: A library of lattice symmetries may be accessed by switching the particle core and DNA shell.
How Crystals Kind The entire process of forming a crystal is referred to as crystallization. Crystallization normally takes place whenever a good crystal grows from a liquid or solution.
, has exactly the same structure, but There are 2 alternatives for choosing the holes that the atoms will occupy. The 3rd layer is often put in excess of the atoms of the initial layer, making an alternate layer sequence A
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。
26Some of the finest ingesting Eyeglasses are produced 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》
水晶常以晶簇、晶洞形式产出，其中水晶洞一般存在于由火山喷发而形成的巨厚熔岩流层的火成岩与玄武岩中。火山喷发时所含的气体或热水溶蚀等作用导致岩层中出现大量的孔隙，当富含硅质矿物的流体进入较薄的熔岩孔隙中，且温、压条件合适时将结晶沉淀出水晶等矿物。
The definition of the strong seems noticeable; a solid is mostly thought of as staying hard and business. Upon inspection, nevertheless, the definition results in being less clear-cut. A dice of butter, by way of example, is difficult following getting saved inside a refrigerator and is also Obviously a stable. Following remaining about the kitchen area counter for per day, the exact same cube turns into pretty soft, and it truly is unclear if the butter must even now be regarded as a solid.
There are two this kind of attainable periodic preparations. In Each and every, the first layer has the atoms packed right into a plane-triangular lattice in which every atom has Crystal six instant neighbours. Figure 2 demonstrates this arrangement to the atoms labeled A
You will find only some distinct device-mobile styles, so a variety of crystals share only one unit-cell type. A significant attribute of the device cell is the amount of atoms it has. The full range of atoms in the entire crystal will be the quantity in Each and every mobile multiplied by the volume of unit cells. Copper and aluminum (Al) Each individual have 1 atom per unit mobile, though zinc (Zn) and sodium chloride have two. Most crystals have only some atoms for every unit mobile, but there are several exceptions. Crystals of polymers, such as, have thousands of atoms in Every device mobile.
The framework of your sodium atoms on your own, or maybe the chlorine atoms by yourself, is fcc and defines the unit cell. The sodium chloride structure So is made up of two interpenetrating fcc lattices. The cesium chloride lattice (Figure 3A) is predicated around the bcc structure; just about every other atom is cesium or chlorine. In such a case, the device cell is a dice. The 3rd critical structure for AB
21You all know how when you have a crystal prism and move a beam of daylight by means of it, you will get a spectrum, which seems like a ongoing band of rainbow hues.