Australia is located and also accounts for about 95% of all expensive opals in the world. The remaining 5% is more or less divided by about 19 state territories. In most of them expensive opals are only found and only in nine states their mining takes place. Australian expensive opals differ from precious opals found in the rest of the world mainly from their origins. While in the world, in all cases, the result of volcanic activity and hydrothermal processes, opal was formed in Australia mostly as a product of the weathering process.
Natural precious opal from Australia (Lightning Ridge) - 15,9x11,3x2,6mm, 2,84ct
Natural precious opal from Australia (Lightning Ridge) - 18,2x11,7x3mm, 4,36ct
Natural precious opal from Australia (Lightning Ridge) - 21,8x16,1x4,7mm, 9ct
Natural precious opal from Australia (Lightning Ridge) - 18x11,8x4,4mm, 6,79ct
Natural precious opal from Australia (Lightning Ridge) - 9x5x2,4mm, 0,64ct
Natural precious opal from Australia (Queensland) - Boulder Opal 21,6x11,6x3,3mm, 8,21ct
Natural precious opal from Australia (Lightning Ridge) - 11,1x6,5x2,8mm, 1,31ct
Natural precious opal from Australia (Lightning Ridge) - 30,9x18,5x6,2mm, 21ct
Natural precious opal from Australia (Lightning Ridge) - 20,9x13,2x4,4mm, 7,2ct
Natural precious opal from Australia (Lightning Ridge) - 29x12,8x3,7mm, 7,4ct
Natural precious opal from Australia (Queensland) - Boulder Opal 10,7x7,6x2,9mm, 2,46ct
Natural precious opal from Australia (Lightning Ridge) - 7x5,1x4mm, 0,79ct
Natural precious opal from Australia (Lightning Ridge) - 19,3x10x4,4mm, 4,93ct
Natural precious opal from Australia (Lightning Ridge) - 14,3x9,6x2,9mm, 2,37ct
Natural precious opal from Australia (Coober Pedy) - 8x6,1x2,4mm, 8x6,1x2,1mm, 1,55ct
Natural precious opal from Australia (Coober Pedy) - 8x6x2,7mm, 7,9x6,2x2,6mm, 1,69ct
Natural precious opal from Australia (Coober Pedy) - 8x5,8x1,9mm, 8x6x2mm, 1,26ct
Natural precious opal from Australia (Lightning Ridge) - 17,2x12x5mm, 5,31ct
Natural precious opal from Australia (Lightning Ridge) - 15x8,8x2,8mm, 2,1ct
Natural precious opal from Australia (Lightning Ridge) - 12,8x11,5x3,8mm, 3,31ct
Natural precious opal from Australia (Lightning Ridge) - 17,4x11,6x4,9mm, 5,85ct
Natural precious opal from Australia (Lightning Ridge) - 19,6x10,7x5,2mm, 5,77ct
Natural precious opal from Australia (Lightning Ridge) - 29,7x10,1x3,9mm, 7,51ct
Natural precious opal from Australia (Lightning Ridge) - 20,1x13,1x2,4mm, 4,88ct
Natural precious opal from Australia (Lightning Ridge) - 16,8x8x3,6mm, 3,73ct
Natural precious opal from Australia (Lightning Ridge) - 12,2x10,1x2,8mm, 2,22ct
Natural precious opal from Australia (Lightning Ridge) - 15,3x10,3x2,1mm, 2,14ct
Natural precious opal from Australia (Lightning Ridge) - 13,5x7,6x3,3mm, 1,93ct
Natural precious opal from Australia (Lightning Ridge) - 13,6x8,2x2,5mm, 1,52ct
Natural precious opal from Australia (Lightning Ridge) - 11,6x8,3x2,1mm, 1,31ct
Natural precious opal from Australia (Lightning Ridge) - 7,3x5,6x1,8mm, 0,39ct
Natural precious opal from Australia (Lightning Ridge) - 16,3x8,8x2mm, 2ct
Natural precious opal from Australia (Coober Pedy) -...