Bidspirit auction | Large Rare 6.39 Ct GIA

Large Rare 6.39 Ct GIA Certified Natural Opal - Unique 6.39 Ct Freeform Gray Opal measuring 17.89 x 12.12 x 5.48 mm. Displays a stunning play of color with a light tone. Do not miss this one! Origin: Australia. Treatment: None. Please see the certification for additional information.