Lapis Lazuli stone (Lapis Lazuli) Afghan weighing 12.272 carats

Technical details: Type: Lazuli (Lapis Lazuli) (Lapis Lazuli) Weight: 12.272 carats Dimensions (mm): 19.19x11.79x5.85 Shape: Oval cabochon (Cabochon) Color: Deep 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, primarily composed of lazurite mineral with varying amounts of other minerals such as pyrite, which appears as golden spots, and calcite, which appears as white lines or spots. Lazuli is known for its rich deep blue color, which was historically used as a dye called "Ultramarine Blue."