HERE'S A 40 X 24 mm. DESIGNER SHAPED, ALL NATURAL , AFRICAN GREEN OPAL THAT HAS BEEN MADE INTO A PENDANT BY HANDCRAFTING A ( 4 mm. ) BAIL FROM .925 ARGENTIUM ( ANTI-TARNISH ) STERLING SILVER ROUND WIRE. THE OPAL WEIGHS 50 CARATS AND HAS A MOHS HARDNESS OF 4 . THIS PENDANT MEASURES APPROX. 2-1/8 INCHES FROM THE TOP OF THE BAIL TO THE BOTTOM OF THE STONE.