Black Opal is Australia’s national gemstone, and black opal is the rarest and most valuable of its kind
Black Opal 3 carats Auction Opal Auctions
Black Opal stone 3.70 cts- beautiful to me because it looks as though there are galaxies inside.
Solid Gem Black Opal- How can something so minute in the grand scheme of things resemble something as large as the universe??
Australian Black Opal—"The Stardust Opal". T-Bones Mine, Corcoran, New South Wales, Australia
Black Opal Stones 15 x 11 x 3mm 2.75 carats Auction #593688 Opal Auctions
Black Opal | Blue Harlequin pattern | Lightning Ridge, Australia ~ this is incredibly beautiful <3
opals australia | UNIQUE OPALS - Australian Black Opals and Opal Jewelry
BLACK OPAL [ CM102 ] 2.51 CTS
Lightning Ridge black opal. http://www.flickr.com/photos/woodsstoneworksandphotofactory/2412732142/in/photostream/