the exploiter of the Australian gem, which he clearly regards as primarily connected with living organisms. Opal: the Gem of the Never Never. By T. C. Wollaston. Pp. xi + 164 + 15 plates.
Frederick: It's simply the most stunning gemstone on the planet ... But over 90% of the world's opal comes from Australia. And a lot of the black opal is found here, at Lightning Ridge.
The stones once again saw a resurgence in the late 19th and early 20th century when opal deposits were discovered in ...