Opal Gemstones - For a stone that helps your jewellery design stand out of the crowd, the Opal is a must. One of the most visually appealing gemstones in our collection, the opal is a fantastic choice of stone. With its unique iridescent colour, these are a striking addition to any jewellery making project. Available in a range of sizes and styles, browse our collection below and find the perfect option for your jewellery making today. Buy Now and Save 15% Off Opal Gemstones.