Opal - 8.69 ct - Antwerp Laboratory for Gemstone Testing (ALGT)

Opal is a fascinating and unique gemstone known for its play-of-color, an optical effect that creates shifting flashes of rainbow hues within the stone. Unlike most gemstones, opal is an amorphous mineraloid composed of silica spheres arranged in a grid-like pattern that diffracts light. This causes opals to display myriad vivid colors and patterns, making each specimen unique. Valued for centuries, opals range widely in appearance, from milky white to dark varieties with striking color flashes. The 8.69-carat opal described here has been tested and authenticated by the Antwerp Laboratory for Gemstone Testing (ALGT), ensuring its genuine nature and aiding in appraising its value. Opals are often used in artistic and distinctive jewelry designs where their captivating optical properties can be showcased.