Grey Opal - 9.30 ct - Antwerp Laboratory for Gemstone Testing (ALGT) - Light grayish orange #antwerp laboratory #gemstone certification #grey opal #muted gemstone color #natural opal #opal gemstone #silica mineral
No reserve price Grey Opal - 30.26 ct - Instituto Gemólogico Español (IGE) - Intense color palette #certified opal #collectible opal #colorful gemstone #grey opal #hydrated silica #intense color #large gemstone #play-of-color #precious opal #unique gemstone
