A pair of African topaz, 7.93 carats

Technical details: Type: Topaz Weight: 7.93 carats Dimensions (mm): 11.20x9.77x5.50 (average) Shape: Pear Color: Light blue Clarity: Eye clean Transparency: Transparent Hardness: 8.0 Treatment: Irradiated Origin: Africa Certification: Certificate from a Saudi laboratory (MT) - website (www.mtgl.com.sa) Topaz is an aluminum silicate mineral, and is considered one of the well-known gemstones 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 pegmatite.