PART IX. CHAPTER I. MALACHITE. Malachite. (Molochites, Pliny.) Tin's Is one of the few metallic ores capable of being used with success for ornamental purposes in place of marble. It is a green carbonate of copper, and occurs essen tially in a stalagmitic form, generally devoid of crystallization. It effervesces freely with heated nitric acid, and has a specific gravity of 3 5 7—3.68 ; hardness, 3.5-4.0. The composition varies, but the two following analyses will serve to give the general result: Klaproth. 1 Copper ... 58.0 Oxygen . . . 12.0 Carbonic Acid .. .. 18.0 Water . . 12.0 Protoxide of Copper Phillips. . 72.2 18.5 9-3 100.0 100.0 Malachite is a very handsome mineral when cut and polished ; presenting various shades of apple to emerald green, and various degrees of translucency 1 Brongniart, Traitd de Min. p. 223.