25+ Carat Green Onyx Loose Gemstone Mixed Lot Natural Loose Onyx Gemstones Gem 25+ CARAT GREEN ONYX LOOSE GEMSTONE MIXED LOT NATURAL LOOSE ONYX GEMSTONES SIZE: 10 X 8 MM TO 7 X 5 MM PARCEL CLARITY: VVS-SI TRMT: DYED CHALCEDONY CARAT: 25+ CARATS FROM ABOVE LARGE ONYX LOT