How cool is this! Per the video description on YouTube, this occurred on January 10, 2017 in Queensland, Australia:

“I am a female boulder opal miner in outback Queensland. In this video, I share one of the most amazing moments that I get to experience with my team; exposing an opal and being the first person on the planet to gaze upon its natural beauty. 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.”