In Queensland’s desert town of Yowah, mates Josiah Kotzur and Lisa van Heijningen live off grid in an old converted school bus and search for opals in their small-scale, solar-powered underground mine. Under the moniker Digi Diggers, Lisa and Josiah share their discoveries on social media and sell opals (as well as virtual replicas of the gemstones) through an online marketplace that Josiah, a tech-head, has built. “Our hope is that we can find opal, sell opal and bring a new generation to the industry,” he says. “Essentially, we’re just trying to do things differently, shake up the world
