An opal miner from Queensland, Australia recently captured the process of exposing one of these incredible minerals, or the hydrated amorphous form of silica in technical speak, on camera. Boulder opal basically consists of concretions and fracture fillings in a dark siliceous ironstone matrix, with it found sporadically in western Queensland, from Kynuna in the north, to Yowah and Koroit in the south. Read more for the video and additional information.
“To find, extract and split a raw boulder opal is simply like no other experience. At our ethically sustainable mining site, we split boulder opal along the opal vein running though ironstone rock every day, if we’re lucky. This boulder opal that we split open has gem grade black opal inside,” said the miner.