In contact metamophosed limestones and dolostones intruded by diabase.
IMA Status:
Valid Species (Pre-IMA) 1948
Locality:
In the USA, at Marble Canyon, Culberson Co., Texas. In Ireland, at Scawt Hill and Ballycraigy, near Larne, Co. Antrim. Link to MinDat.org Location Data.
Name Origin:
For Max Albrecht Bredig (1902- ), physical chemist, who studied the polymorphism of Ca2SiO4.