Koroit Boulder Opals

If you have dealt with a lot of opal, it is usually easy to distinguish the difference between Yowah and Koroit opals, apposed to Winton and other Boulder mining areas like Quilpie, Jundah and Eromanga. Vein opals are sought after for high end jewelry designs, and are mostly unique to this region. Matrix opals are also discovered here which is another type of opal with sparkle (often rainbow in colour) showing thru ironstone. There is also another type of opal found in Yowah that is very unique to the region, being the famous Yowah nut.