Photo by Violet Anderson Royal Ontario Museum Andradite, a member of the garnet group, occurs at MSH in miaroletic cavities and rarely in marble xenoliths. Luster is vitreous. Diaphaneity is translucent to opaque. Crystal Habits include sharp dodecahedra to 8mm and small clusters of crystals. Cleavage none observed.
Fracture is subconchoidal.
Hardness is 6.5 - 7.5. Streak is white. Associated Minerals include barite, grossular, pectolite and sodalite.