Synopsis of Mineral Characters; Alphabetically Arranged for Laboratory and Field Use

by Ralph W. Richards

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1907 ...12 diamond-shaped faces, etc., meeting at 1200: Garnet. Trapezohedron, 12 trapezohedral Garnet. Pyritohedron, 12 pentagonal Pyrite. Tetrahedron, 4 triangular Tetrahedrite. Isomorphous, Iso. Mineral substances are said to be iso. which form to a greater or less degree crystals consisting of a homogeneous mixture of the two or more substances. JADE. A tough microscopically fibrous Tremolite or Actinolite, q.v. H. 6.5. Jadeite = 7. Splintery fracture. Occ. In boulders. D. 394. M. & P. 390. JADEITE. Sodium aluminium silicate, HaAl(SiO3)2. Compact, very tough, interlocking fi-brous masses of pyroxene. Grayish to dark green. H. 7. Jade = 6.5. Splintery fracture. Fuses 2.5. Jade = 2.5+. Occ. In boulders. D. 393. M. & P. 386. JAMESONITE. Lead sulfantimonate, Pb.Sb2S5. Dark lead-gray to black, resembling tarnish"d silver. H. 2-3. Brittle. Basal cleavage prominent. Stibnite lacks this. Sp.Gr. 5.5-6. Stibnite = 4.5. Decrepitates, fuses at 1, and volatilizes. Occ. With ores of antimony. D. 308. M. & P. 259. JASPER. A chalcedony (q.v.) impure from clay and iron. Opaque, dull creamy luster. Red, yellow, dark green, and grayish KAINITE. Hydrous potassium magnesium chlorsulfate, MgSO..KCl+3HsO. Crusts and tabular to prismatic monoclinic crystals. blue. Colorless, white, dark red. Biting salty taste. Occ. With halite, etc. D. 530. M. & P. 310. KALINITE. Hydrous potassium alum, KA1(SO4),.I2HsO. Massive, fibrous, mealy crusts and artificial (alum) octahedral crystals. H. 2.5. Brittle. Alum taste. Fuses at 1, froths to spongy mass, violet (K) flame. Occ. With clay, kaolinized minerals, and clay-slate. D. 535. M. & P. 311. KAOLIN. See Kaolinite. KAOLINITB. Hydrous aluminium silicate, H4Al2Si2Cv Massive, compact, and clay-like. Earth...

26 pages, Paperback

Published January 1, 2012