CALX (calcareous earth) ſaturated with a peculiar acid, perhaps of a metallic nature (§ 33). In acids, particularly in the muriatic, it aſſumes a remarkable yellow colour, but is not very ſoluble.
Cronstedt Min. § 210. Lapis ponderoſus. Tungſten.
CALX aerata (calcareous earth mild), contaminated by a ſmall proportion of magneſia ſalita.
Magneſia.
CALX aerata (calcareous earth mild) contaminated by clay.
Argillaceous.