Opal Diamond Pendant
14K Solid Yellow Gold 0.70ct Natural Solid Australian Opal Origin: Lightning Ridge Mine 0.025ct Natural Diamond Much of the world's precious opal is mined in the harsh outback of Australia, where a unique combination of geological conditions permitted the formation of opal near the margins of an ancient inland sea. Australia is regarded as the world's leading source of opal and of the world's finest opal. What gives opal its colour?Opal is made of tiny spheres of silica dioxide - spheres so tiny they can only be seen using an electron microscope. In precious opal – the name given to opal with spectral colours, or 'play of colour' – the tiny spheres of silica dioxide are uniform in size and stacked in regular rows and layers. This configuration creates lattices that diffract white light into different colours of the spectrum. The tiniest spheres produce violet-coloured opal; the largest, red, with sphere size increasing from the violet to the red end of the spectrum. The great maj