Sugilite is a rare purple cyclosilicate mineral. Sugilite gets its attractive purple color from traces of manganese. It can range in color from pinkish-purple to deep bluish-purple. The most highly valued sugilite gemstones are a uniform and intense purple. A great deal of sugilite has patches, veins or layers, and attractive or interesting patterns are also desirable in sugilite gemstones.Sugilite may have minor impurities or it may be mixed with chalcedony. It can have black matrix inclusions, veins, blotches, or layers. The luster is vitreous, resinous or waxy. Most sugilite is opaque with some rare gemstones showing translucency.