ciiRoirocnRE. 639 Sky-blue. Streak shining, n = 4...5. g- = 2'56. Yields water in the matrass. According to Plattner, it contains 46'6 per cent, of oxide of copper. Is found in the valley of Schap- bach in Baden. KITPFERMANGANSCHWARZE. — Amorphous. Frac ture conchoidal. Opaque. Lustre resinous. Blueish-black. Streak the same. Slightly brittle, n = 3‘5. a = 3-1...3-2. Analyses of compact kupfermanganschwiirze a from Kams- dorf by Rammelsberg, I from Kamsdorf by Bottger, c from Schlackenwald by Karsten, d of an earthy variety from Lauter- berg by du Mend: — Protox. mangan. , . . Oxygen Black oxide of copper Bed oxide of iron . . . Barytes Lime Magnesia Oxides of cobalt and nickel Potash Silica Water Is found at Kamsdorf, Schlackenwald, Lauterberg, Zellerfeld, Rheinbreitenbach, Kupferberg, Rudolstadt, Cornwall, the Ba- nat, Sehlangenberg in Siberia. CIIROMOCITRE. — Fracture earthy, uneven. Opaque or faintly translucent. Dull, sometimes feebly glistening. Green. It is usually so intimately mingled with other mineral substances, that it can only be separated from them by chemical operations. Analyses of substances coloured by oxide of chrome a from Creuzot by Drappiez, b from Waldenburg in Silesia by Zellner, c from Marlenberg in Dalarne in Sweden by Ilisinger, d from Halle by Wolf:— a b C d 40'99 53-22 00-01 27-01 8-01 9-14 7-49 3-04 14-07 10-85 4-80 11-51 4-70 1-88 0-12 28-99 1-04 1'70 1 — 2-25 2-85 — — 0-09 gypsum 1-05 — 0-49 0-14 — — 062 0-05 — 2-74 — 0-30 — 14-40 10-04 20-10 29-45 a b c d Oxide of chrome . . . 13 - 0 20 10 4-28 Oxide of iron . . . . . 2-0 3-0 3 3-15 Silica 68-5 39 40-11 Alumina .... . . . 27-0 30-0 30 30-53 Lime soda 0-46 Potash .... — — 3-44 Water .... . . . — e-25 8 12-52 Reniform, massive, investing other minerals. Is found in a conglomerate at Creuzot in France, in the porphyry of Elfdal
