438 TABLE XII. FOR DETERMINATION OF MINERALS. 



IV.- 



-CRYSTALS MONOCLINIC. 





1. Luster unmetallic. 





* Soluble. 





Hardness. Sp. gr. CleaTage. 



Natron, 



103 1-0— 1-5 1-4— 1-5 



Glauber salt, 



102 1*5—2-0 1-5—2-0 



Copperas, 



246 2-0 1-8—1-9 One perfect. 



Borax, 



107 2-0—2-5 1-7 Lat. perfect. 



tJnsoluble 



: no fumes before the blowpipe on charcoal. 



Vivianite, 



248 1-5—2-0 2-6—2-7 Basal, perfect f 



Gypsum, 



112 2-0 2-3—2-4 Foliated! 



Mica, 



191 2-0—2-5 2-8—3-0 Foliated!! 



Heulandite, 



164 3-5—4-0 2-1—2-2 Foliated. 



Laumonite, 



166 3-5 — 4-0 2-3 One distinct. 



Green malachite, 



298 " . 4-0—4-1 Basal, perfect. 



Azurite, 



300 3-5 — 4-5 3-5—3-9 Lateral. 



Clintonite, 



148 4-0—5-0 3-0—3-1 Foliated. 



Monazite, 



206 5*0 4-8—5-1 Basalt, perfect ! 



Datholite, 



142 5-5—6-0 2-9—3-0 Indistinct. 



Sphene, 



211 " 3-2—3-5 Indistinct. 



Hornblende, 



152 5-0—6-0 2-9—3-4 Lat. perfect. 



Pyroxene, 



150 « 3-2— 3-5 Lat. distinct. 



Allanite, 



207 " 3-3—3-8 Indistinct. 



Feldspar, 



176 6-0 2-3—2-6 One prf ; one imp* 



Chondrodite, 



157 6-0 — 6-5 3-1 — 3-2 Indistinct. 



Epidote, 



182 6-0—7-0 3-2—3-5 Lat. imperf. 



Spodumene, 



156 6-5—7-0 3-1—3-2 Lat. perfect. 



Euclase, 



199 7-5 2-9—3-1 Basal, perfect 





t Fumes before the blowpipe. 



Cobalt bloom, 



267 1-5—2-0 2-9—3-0 Basal, perfect ! 



Realgar, 



226 " 3-3—3-6 Imperfect. 



Pharmacolite, 



226 2-0—2-5 2-6—2-8 Basal, perfect !! 



Miargyrite, 



327 ." 5-2—5-4 Lat. imperfect. 





2. Luster metallic. 



Miargynte, 



327 2-0—2-5 5-2—5-4 Lat. imperfect, 



Wolfram, 



244 50—5-5 7-1—7-4 One perfect. 



Warwickite, 



5-5 — 6-0 3-0 — 3-3 One perfect. 



Allanite, 



207 " 3-3—3-8 Imperfect. 



V.— CRYSTALS TRICLINIC. 

 * Soluble. 



97 2-5 2-2—2-3 Imperfect 



