A cubic polymorph of mercury sulfide, typically black or greyish-black. It's associated with transformation and grounding, but with a more subdued energy than red Cinnabar. (Mercury content, handle with extreme care).
Greyish-Black, Black, often with a submetallic luster
Metacinnabar is classified as a sulfide mineral mineral which typically crystallizes in the cubic system. Its chemical formula is HgS. Common crystal habits include massive, rarely as tetrahedral crystals, as incrustations.