Stone - Green Onyx Size - 9x11mm to 9x13mm Shape - Rough Length & Weight -8 Inches / 164 Carats Length & Weight -16 Inches / 336 Carats Treatment - No Treatment 100% natural & genuine Measurements & weight are close approximations. Note: Color may vary due to characteristics of the natural stone. Natural Green Onyx Organic Rough Beads , 9x11mm To 9x13mm, Raw Drilled Beads, 8 Inches/16 Jewelry Making, Price Per Strands