Natural Australian Koroit Boulder Opal from Queensland. Beautiful, large boulder. Weight 110.75.7 Ct. Size: 29 mm x 19 mm x 10 mm. I have added a video and pics taken under light. The stone is even brither under the sunlight. Please note the natural occuring on the back of the stone, which are normal for large-sized opals. The stone was sourced a long time ago from a minor in Queensland. Let me know if you have more questions or if you need more pics. For international buyers, please contact me first.