Chalcedony

Natural Chalcedon Rough and Utreated

Chalcedony is a cryptocrystalline form of silica, composed of very fine intergrowths of quartz and moganite. These are both silica minerals, but they differ in that quartz has a trigonal crystal structure, while moganite is monoclinic.

极品斗地主 电竞竞猜 bbin体育 皇马电竞app 幸运彩票