Boulder Opals are found exclusively in the Queensland Area of Australia. Thin Veins of Colourful Opal forms in cracks & fissures in Ironstone & Sandstone rocks & Boulders creating their distinctive appearance. The thin layers of Opal can display beautifull play of colour & Patterns, full faced Boulder Opals are more valuable than Opal that display small veins ,however this depends on the type ,colour ,Brightness & pattern of the opal , top Boulder Opals can fetch up to £1750 per Carat.
Moving on to mining Boulder Opals and the exact estimates does vary on undiscovered reserves its challenging to quantify precisely the amounts.The vastness off Queensland's Opal bearing dessert Sandstone formation suggests significant potential miners continue to explore & uncover new pockets of Opal rich Rock ,however the exact quantity remains uncertain. Boulder Opals remain a treasure waiting to be unearthed & their allure continues to captivate Gem enthusiasts & collectors Worldwide.