Lapis lazuli ˈ l æ p ɪ s ˈ l æ zj ʊ l i l aɪ or lapis for short is a deep blue metamorphic rock used as a semi precious stone that has been prized since antiquity for its intense color. Lapis lazuli by definition is a rock primarily composed of lazurite calcite and pyrite. It is also assigned to the planet jupiter.