No reserve price White, Multicolour Opal - 7.85 ct - Antwerp Laboratory for Gemstone Testing (ALGT) - Fine Color Quality

Opal is one of the most admired gemstones due to its unique play-of-color — an optical phenomenon where the stone reflects flashes of iridescent colors. White or multicolored opal refers to varieties that have a predominantly milky, light body tone with vibrant flashes of multiple colors visible across the surface. These colors result from millions of microscopic silica spheres arranged in a grid-like pattern within the stone, diffracting light and creating shifting spectral colors. Originating mainly from Australia but found in various regions globally, opals are cherished for their distinct visual appeal and often used in fine jewelry. The Antwerp Laboratory for Gemstone Testing (ALGT) designation ensures the opal's authenticity and quality, making such a stone a desirable item for collectors and enthusiasts who appreciate the complexity and beauty of fine-color-quality opals.