Tiara Opals and Gems NATURAL COLOR FROM THE OPAL FIELD THIS OPAL HAS AMAZING COLOURS The Winton opal field is known for the very distinctive type of boulder opal that is found in its mines. Here opal is found as a kernel in small concretions. Each opal is individually cut and polished by hand and time spent to get the best finish with the Opal. Natural Solid Untreated Australian Boulder Opal Polished Stones Good Pattern and Beautiful Bright Colours This beauty is ready to be set in jewellery. QUEENSLAND, AUSTRALIA