https://www.etsy.com/au/listing/482900053/genuine-australian-black-opal-flashy?ref=shop_home_active_2

GEMSTONE : Natural Black Opal & White Topaz
Hardness : 5.5 – 8.0 Mohs Scale
LOCALITY : Australia & Africa
GEMS SIZE : 1.0 mm to 10.0 X 8.0 mm (black opal)

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