Dyed green Onyx AGATE gem Polished flat 8 half mm round cabochon
Freeform Cabs > Buttons Barrels Etc Onyx Freeforms Wire Wrapping Stones Dyed green Agate some refer to as Onyx Onix polished rough gemstone single Sort of roundish button like solitaire for wire wrapping or use in around 8.5mm cabochon setting Onyx Freeforms Wire Wrapping Stones http://facetroughgemstones.com/gem-store/product_info.php/products_id/4013