A ( 48 X 36 X 8 mm. ) ALL NATURAL OVAL SHAPED AUSTRALIAN GREEN CHRYSOPRASE GEMSTONE THAT WILL BE MADE INTO A BEAUTIFUL NECKLACE BY HANDCRAFTING A HOOK CLASP ON A BLACK LEATHER CORD WITH YOUR CHOICE OF EITHER 14-KT. ROLLED GOLD OR .925 ( ARGENTIUM ) STERLING SILVER. THIS GEMSTONE WEIGHS 135 CARATS AND HAS A MOHS HARDNESS OF 7 .