Natural opals with play-of-colour, including white, crystal and fire opal, as loose stones and set in gold and silver jewellery. Opal is hydrated silica made of tiny spheres that split light into flashes of colour, called play-of-colour.
Natural opals with play-of-colour, including white, crystal and fire opal, as loose stones and set in gold and silver jewellery. Opal is hydrated silica made of tiny spheres that split light into flashes of colour, called play-of-colour.