Crushed Lapis Lazuli Coarse Sand - Natural GemstoneLapis lazuli is one of the oldest gemstones in human history prized for thousands of years for its distinctive deep blue color. It is a metamorphic rock composed primarily of lazurite, calcite, and pyrite, which together produce its characteristic rich blue. Our coarse grind lapis sand shows the stone's deep, rich blue at its most vivid. For Jewelry Makers & Crafters Coarse lapis lazuli sand creates a deep, saturated blue in resin casting, crystal