The best Side of Crystal
The best Side of Crystal
Blog Article
轴性、光性：一轴晶正光性。正交偏光下所看到的一轴晶干涉图是独特的，其黑十字臂未达中心，形成中空的图案，俗称牛眼干涉图。中心部分通常为淡绿色或淡粉色。
③、粗抛光：是将模具压出之毛胚，以金刚石盘直接磨出成品之刻线。④、细抛光：在粗抛光之后，以抛光粉来磨成品至晶莹剔透为止。
A essential principle in crystal buildings will be the unit mobile. It's the smallest device of quantity that allows identical cells to become stacked jointly to fill all House. By repeating the pattern with the device cell time and again in all Instructions, the whole crystal lattice might be constructed. A cube is The best example of a device cell. Two other illustrations are demonstrated in Figure 1. The very first would be the unit mobile for any encounter-centred cubic lattice, and the second is to get a overall body-centred cubic lattice. These structures are stated in the subsequent paragraphs.
Tetragonal: These crystals variety prisms and double pyramids. The construction is like a cubic crystal, other than a single axis is for a longer time than another.
《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。”
Monoclinic �?Characterized by a few unequal axes, two of which intersect at an oblique angle, though the third is perpendicular towards the airplane of one other two.
水晶与高档宝石的净度要求有很大不同。高档宝石稀少罕见，所以一般人们普遍对高档宝石的净度不会过于苛求。而水晶的产量着实大得惊人，所以通常人们会要求水晶净度越高越好，尽量避免有较明显的内含物的水晶。
Skip to main written content Thanks for going to nature.com. You will be employing a browser Variation with limited guidance for CSS. To acquire the most beneficial encounter, we advocate you use a more up-to-date browser (or convert off compatibility manner in Net Explorer).
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�?。
多色�?无色水晶没有多色性。有色水晶有弱到强的多色�?表现为体色的不同深浅。
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”。
Crystals are not merely renowned for his or her physical visual appearance, but different crystals of different components and formations may lead to an unlimited assortment of uses and Bodily Qualities.
玉石纹理如果能形成美丽的花纹、图案，其价格就高，如玛瑙内红白相间的色带有规律地排列，形成缠丝玛瑙时，碧玉中的不均匀颜色形成一种风景图案时，材料的价值将提高。当水晶内包裹体形成美丽的图案时，如幽灵水晶、风景水晶，或者针状包裹体呈束状排列时，其价值都高于普通的水晶。图案越美观、越有意境越好。
21You all understand how when you have a crystal prism and move a beam of daylight by it, you will get a spectrum, which more info appears like a continuous band of rainbow colours.