Copper selenide, known for its bluish-black to violet color. It's associated with deep transformation and intuition but requires caution due to selenium.
Bluish-Black, Violet-Blue, Reddish-Violet, often massive or forms fine-grained aggregates
Umangite is classified as a selenide mineral mineral which typically crystallizes in the tetragonal system. Its chemical formula is Cu3Se2. Common crystal habits include massive granular.