Boulder Opals are a natural treasure! Their vibrant and bright colours shine through each stone differently, glistening so uniquely. Boulder Opals are just one type of the beautiful opals that Australia has to offer. Here at Custom Jewellery Co, we love working with Queensland Boulder Opals and turning them into fine jewellery. Something that makes Boulder Opals so special to us is the fact that they are predominantly found and mined right here in Queensland! This means we can keep our whole jewellery making process local and ethical; from mining, to cutting and production, to jewellery making - it’s all able to be done locally.

Boulder Opals are unique from other opals because of the way they are formed. These opals naturally form in crevices and fractures in ironstone and sandstone boulders and, when mined, the opals are attached to these boulders or ‘host rocks’. Natural Boulder Opals are found within these hosts rocks in a range of sizes varying from less than a few centimetres to more than 20cm! These ironstone boulders are distributed in a stretch from North-West of the New South Wales border right up to Northern Queensland (over 1000km). It is here where most of the world's Boulder Opals are mined. Many of the mining operations are family-based, meaning they are run and owned by local people. We work with some of these miners to select the best Queensland Boulder Opals to use in our handcrafted jewellery.