cryptocrystalline quartz jade. Chalcedony and agate have a very long history. عن 100 منذ مليون سنة, underground magma spewed out due to the changes in the earth's crust. عندما تبرد الحمم البركانية, steam and other gases formed bubbles, and the bubbles were sealed when the rock was frozen to form many holes. After a long [...]
