...; opake ; diversified with spots or zones ; phosphoresces by heat and friction. Comp. (Hungarian.) Lime 47 ; phosphoric acid 32.25 ; fluoric acid 2.5 ; silex 0.5 ; oxide of iron 0.75 ; water 1 ; sand mixed with clay 11.5. — Klaproth. Pinkerton says, that it is reported by some to form hills,...