Gemstone size 20*30--30*50mm Gemstone weight as per size Treatments applied polishing Optical special effects iridescence/iridescent Hardness 8-8.5moh's Refractive index 2.15-2.18 Usage fashion jewelry making , rings, earings and other decoration. Normal package a: small sizes Packed in vacuum bags. Or packed in plastic bags. B: large sizes Wrapped in soft paper. Tied with rubber rings. Put in standard export cartons. (300mm*200mm*200mm) 2. Special package according to customers' need.