African tourmaline stone, 2.643 carats

Technical details: Type: Tourmaline (Tourmaline) Weight: 2.643 carats Dimensions (mm): 9.93x7.93x5.12 Shape: Oval Color: Pink Clarity: Eye-clean Transparency: Transparent Hardness: 7.0-7.5 Treatment: Untreated Origin: Africa Certification: Certificate from Saudi Laboratory (MT) - Website (www.mtgl.com.sa) Tourmaline is a complex group of borosilicate minerals, known for its wide range of colors that make it one of the most colorful gemstones. It forms in hexagonal crystal systems and often shows pleochroism, where its color varies depending on the viewing angle. Tourmaline can be found in igneous and metamorphic rocks, and its different colors — such as pink, green, blue, and black — depend on its unique chemical composition and the presence of certain impurities.