Lapis Lazuli stone (Laviz Lazuli) Afghan weighing 17.003 carats

Technical details: Type: Lapis Lazuli (Lazuli Lapis) (Lapis Lazuli) Weight: 17.003 carats Dimensions (mm): 21.97x13.07x7.36 Shape: Oval cabochon (Cabochon) Color: Dark blue Clarity: Unclassified Transparency: Opaque Hardness: 5.0-5.5 Treatment: Untreated Origin: Afghanistan Certification: Certificate from Saudi Laboratory (MT) - website (www.mtgl.com.sa) Lapis Lazuli is a dense dark blue rock, not a single mineral, and is mainly composed of the mineral lazurite with varying amounts of other minerals such as pyrite, which appears as golden spots, and calcite, which appears as white lines or spots. Lapis Lazuli is known for its rich deep blue color, which was historically used as a dye called "Ultramarine Blue."