TABLE III. 



FOR DETERMINATION OP MINERALS. 437 





Hardness. Sp. gr. Cleavage. 



Mica, 



193 " 2-8— 3-1 Foliated!! 



A.nglesite, 



281 2-5— 3-0 6-2—6-3 Imperfect. 



Heavy spar, 



108 2-5— 3-5 4-3— 4-8 Imperfect. 



Celestine, 



HO " 3-°— 4-0 Lat. distinct. 



Anhydrite, 



114 3-0—3-5 2-8—3-0 Three rect. dist. 



White lead ore, 



281 " 6-1—6-5 Lat. perf. 



VVitherite, 



109 " 4-2—4-4 Imperfect. 



Serpentine, 



145 3-0—4-0 2-5—2-6 Sometimes fol. 



Strontianite, 



111 3-5—4-0 3-6—3-8 Lat. distinct. 



Wavellite, 



130 " 2-2—2-4 Two distinct. 



Stilbite, 



165 " 2-1-2-2 One perfect! 



Harmotome, 



168 4-0—4-5 2-4—2-5 Imperfect. 



Wolfram, 



244 5-0—5-5 7-1—7-4 One perfect. 



Lazulite, 



131 5-0—6 3-0—3-1 Indistinct. 



Yenite, 



245 5-5-6-0 3-8—4-1 Indistinct. 



Prehnite, 



170 6-0—7-0 2-8—3-0 Basal, distinct. 



lolite, 



190 7-0—7-5 2-5—2-7 Indistinct. 



§ Giving fumes before the blowpipe on charcoal 



Orpiment, 



226 1-5—2-0 3-4—3-6 Foliated! 



Sulphur, 



98 1-5—2-5 2-0—2-1 Indistinct. 



White vitriol, 



271 2-0—2-5 2-0—2-1 One perfect. 



White antimony, 



224 2-5—3-0 5 : 5— 5-6 Lat. perfect !! 



Atacamite, 



302 3-0—3-5 4-0—4-4 Basal, perfect. 



Scorodite, 



249 3-5—4-0 3-1—3-3 Imperfect. 



2. Luster metallic. 



No fumes before the blowpipe on charcoal. 



Pyrolusite, 





259 2-0—2-5 4-8—5-0 Three imperfect, 



Manganite, 





261 4-0—4-5 4-3 — 4-4 One imperfect. 



Wolfram, 





244 5-0—5-5 7-1—7-4 One perfect. 



Yenite, 





245 5-5—60 3-8—4-1 Indistinct. 



Columbite, 





243 5-0—6-0 5-9-6-1 Indistinct. 



Tantalite, 





244 " 7-2—8-0 Imperfect. 





t Fumes before the blowpipe on charcoal 



Gray antimony, 



222 2-0 4-5—4-7 One perfect ! 



Brittle silver 



ore, 



326 2-0—2-5 6-2—6-3 Imperfect. 



Vitreous copper, 



292 2-5— 3-0 5-5 — 5-8 Lat. indistinct. 



Leucopyrite, 





235 5-0—5-5 7-2-7-4 One distinct. 



Mispickel, 





234 5-0-6-0 6-1 — 6-2 Lat imperfect. 



White iron pyrites, 233 6-0— 6-5 4-6— 4-9 Lat imperfect. 



