https://www.etsy.com/listing/1304325872/natural-australian-opal-24x7x2-mm-380?
https://www.etsy.com/listing/1304344168/natural-australian-opal-15x11x2-mm
https://www.etsy.com/listing/1304318702/natural-australian-opal-15x10x2-mm-250
https://www.etsy.com/listing/1305713816/8-piece-doublet-opal-gemstone-3885-carat?