Useful Knowledge: Volume 1. Minerals

Note 192 — MINERALS. (continued 2)

Reading edition

ALABASTER, or GYPSUM, is a kind of sulphat of lime, or of lime in combination with sulphuric acid (24), which has a shivery and glittering texture; and is of white colour tinged with grey or red, and sometimes striped, veined, or spotted. When crystallized, the primitive form of its crystals is a regular four-sided prism (Pl. II, Fig. 14.)

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