Black Opal from Koroit, Australia. Koroit is located approximately 1000 kilometres from the east coast of Australia, right in the heart of Outback Queensland. The opals from here are unlike opal anywhere else in the world.
malformalady: Koroit opal — The Koroit opal field is an opal mining area in Paroo Shire in South West Queensland, Australia.The Koroit opal field is known for the very distinctive type of boulder opal that is found in its mines
Detroit agate/ aka Fordite is old car paint, hardened, cut & polished; formed from the build up of layers of enamel paint slag on skids on which cars were hand-painted, which have been baked numerous times.
cabochon of Mohave purple turquoise. It is composed of small chunks of natural blue turquoise, to which they added red dye and a brassy-bronze metallic. Beautifully rich coloration, with plenty of contras
Black opal is the most coveted of all opal varities. The "black" in black opal means the gem has a very dark body tone. A black opal can be crystal or opaque. The rarest colour is red, next is green and orange with blue as the most common colour.