Opals traditionally come from Australia, and are characterised by flashes of colour which appear from deep within the stone. This iridescent play of colour is caused by tiny spheres of amorphous silica, which naturally refract the light. Unlike other gemstones, opals are not crystalline, and are instead formed from hardened silica gel, which makes them both unusual and quite fragile. Measure 5.5 -6 on the Mohs scale, they can be affected by changes in temperature, humidity and light so must be stored and worn with care.
Our Opal Jewellery