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AMPHIBOLE. 297 peach-blossom-red, brown, spotted with green. Streak reddish- white. H = 5‘0... 5-6. 0 = 3-61..,3'65. Before the blowpipe on charcoal in the inner flame melts into a red semi-transparent glass, in the outer flame into a black globule. With borax and salt of phosphorus in the outer flame melts into a violet glass, the colour of which disappears in the inner flame. Is not decomposed by hydro chloric acid. By exposure the manganese becomes more highly oxidized, and combines with water, forming a black crust. MnSi, silica 46-41, protoxide of manganese 63-69, part of the An being replaced by Fe, zc, Ca, Mg. Analyses of rhodonite a from Langbanshytta by Berzelius, i from Algiers and c from St. Marcel in Piedmont by Ebelmen, d from Sterling in New Jersey by Hermann:— Silica Protoxide of manganese Protoxide of iron Oxide of zinc . Lime .... Magnesia . . Loss by ignition a b c d 48-00 45-49 46-37 46-48 49-04 39-46 47-38 31-52 — 6 42 — 7-23 — — — 6-85 3-12 4-66 6-48 460 0-22 2-60 — 3-09 — — l’OO d compact masses, at Langban- near Katharinenburg, Kapnick in Transylvania, Schebenholz near Elbingerode, and Oberstahl- berg near Kubcland in the Harz, New Jersey, Piedmont, Algiers. 1G(5. AMPHIBOLE.—Hornblende; Phillips. Amphibole; Hauy. Hemiprismatischer Augit-Spath; Mohs. Amphibol; Hausmann, Haidinger. ^ Oblique. 101,100 = 60° 35'; 111,010 = 77° 13'; 101,001=24° 27'. a 100, b 010, C 001, Z 021^ I 101, W 101, t 201, m HO, n 310, e 130, k ill, r ill, v 131, i 131, o 221. la C O 10 35' mb 62° is' me 76° 48' ca 76 2 eb 32 21 CO 121 29 wa 106 2 mm 124 30 cr 145 35 ta 130 6 kb 77 13 rt 28 31 tc 65 4 vb 56 46 zt 60 8 cb 90 0 rb 74 14 vt 81 21 zb 60 26 ib 49 45 mt 124 42 ab 90 0 ob 65 48 nb 80 3 kc 27 0 5 24