AN UNBIASED VIEW OF CRYSTAL

Not all crystals are equally crystalline. There are sometimes impurities, and also the ionic & covalent between molecules can make vastly different buildings from a similar content. An excellent illustration 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