Palygorskite

Palygorskite is a key component in the pigment “Maya Blue” used in Mayan ceramics, painting, and textiles. It is a fibrous clay mineral. A terrific article appeared in R&M and can be reviewed here https://www.tandfonline.com/doi/abs/10.1080/00357529.1985.11764397 . Ex George Loud

Locality: Lone Jack Quarry, Glasgow, Virginia

Composition: magnesium aluminum phyllosilicate