Topaz stone, 13.22 carats

Technical details: Type: Topaz Weight: 13.223 carats Dimensions (mm): 13.77x12.21x9.90 Shape: Oval Color: Brown Clarity: Eye clean Transparency: Transparent Hardness: 8.0 Treatment: Untreated Origin: Unknown Certification: Certificate from Saudi Laboratory (MT) - website (www.mtgl.com.sa) Topaz is an aluminum silicate and fluorine mineral, and is known as a gemstone for its hardness and beauty. Topaz appears in a wide range of colors, including transparent (colorless), yellow, golden, blue, pink, red, and brown. Some types of topaz are often heat-treated or irradiated to enhance or change their colors, especially to produce bright blue. Topaz forms in acidic igneous rocks such as granite and gneiss.