Luster is a bright metallic. Crystals are opaque. These are sometimes described as looking like writing. Also found as granular masses. Cleavage is absent.
Fracture is conchoidal.
Streak is a yellow gray. Crystals tend to be deeply striated parallel to the prominent length. Associated Minerals include gold , quartz , celestite , fluorite , pyrite , nagyagite , sylvanite , krennerite and other rare telluride minerals. Best Field Indicators are crystal habit, density, softness, color, luster, association with other tellurides and gold and lack of cleavage.