Weight: 1 Pound 1.8 Ounces
Dimensions: 7 Inches Long, 4.3 Inches Wide, 2 Inches Thick
The item pictured is the one you will receive.
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