Weight: 1 Pound 6 Ounces
Dimensions: 5.4 Inches Long, 4.6 Inches Wide, 2.6 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