Lapis Lazuli stone (Lapis Lazuli) Afghan weighing 28.009 carats

Technical details: Type: Lazuli (Lapis Lazuli) (Lapis Lazuli) weight: 28.009 carats dimensions (mm): 23.66x12.31x9.54 shape: oval cabochon (Cabouchon) color: dark blue clarity: unclassified transparency: opaque hardness: 5.0-5.5 treatment: untreated origin: Afghanistan certification: certificate from the Saudi (MT) laboratory - website (www.mtgl.com.sa) Lapis Lazuli is a dense dark blue rock, not a single mineral, mainly 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. Lapis Lazuli is known for its deep rich blue color, which was historically used as a dye "Ultramarine blue".