A solid is crystalline if it's long-variety get. When the positions of an atom and its neighbours are recognised at 1 point, the put of every atom is understood exactly through the crystal. Most liquids absence extended-vary order, Though lots of have shorter-assortment purchase. Limited vary is outlined as the first- or next-closest neighbours of the atom. In several liquids the very first-neighbour atoms are organized in the identical construction as in the corresponding solid stage.

A elementary thought in crystal structures could be the unit cell. It's the smallest device of volume that allows equivalent cells being organized with each other to occupy all available Room. The geometrical basis of all crystals will be the lattice. A lattice is often considered as a daily and infinite arrangement of points or atoms, in which Each individual stage or atom has An analogous encompassing ecosystem.

4Without a crystal ball, It can be not possible to convey where we are going to be next 12 months.不用水晶球预卜未来，我们说不准明年处境如何呀。《牛津词典》

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。

《全唐诗》卷七八五载《白雪歌》：“鸟啄冰潭玉镜开，风敲檐溜水晶折。”

第二种是“半包裹体”，在水晶结晶以后，由于受到地球引力的影响而产生的裂隙，晶体外的一些物质通过水晶的裂隙渗透到水晶内部，一部分包裹于水晶之中另一部分露于水晶之外。我们可以看到物质渗进水晶的裂迹，常被称为“通道”，这种包裹体所形成的景象相对地较受自然环境和时间的影响，相应的价值也比较�?。

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。

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24I want to make my that means crystal distinct.我想把我的意思解释得清清楚楚。《牛津词典》

The definition of the stable appears evident; a stable is usually considered becoming tricky and organization. On inspection, however, the definition will become much less clear-cut. A cube of butter, such as, is hard immediately after staying saved within a refrigerator and it is Obviously a reliable. Right after remaining about the kitchen counter for a day, a similar cube becomes really delicate, and it really is unclear When the butter must nevertheless be viewed as a reliable.

15The trick to a good thermoelectric product is usually a crystal structure by which electrons can circulation freely.制造一种好的热电材料的关键是，需要一种电子可以自由流动的晶体结构。

The sodium chloride crystal lattice is characterized from the close packing with the positive sodium ions and detrimental chloride ions. Each and every sodium ion is surrounded by six chloride ions, and every chloride ion is surrounded by 6 sodium ions, creating a really stable and symmetrical framework.

⑤、打孔：是在水晶成品未完成前，根据其所需打孔之尺寸及位置，以钻头加工，如制表件、笔筒、瓶孔等。

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。