Not known Factual Statements About Crystal
Not all crystals are equally crystalline. There are often impurities, and also the ionic & covalent in between molecules can build vastly unique structures from precisely the same materials. A terrific example of this are diamonds and graphene.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