Strontianite (SrCO3) is a mineral consisting of strontium carbonate. This mineral is white, greenish, or yellowish in color,
usually occurring in fibrous massive forms, but sometimes in prismatic[?]crystals.
... guitar. Pigpen played keyboards, harmonica and, was an inspirational vocalist until his death in 1973. Both Bill and Mickey played drums, and a wide variety of oth ...