TABLE III. FOR DETERMINATION OF MINERALS. 439 



t Insoluble : fusible. 

 Hardness. Sp. gr. Cleavage. 



Albite, 177 6-0 2-6-— 2-7 One perf. ; two 



imperfect. 



Labradorite, 178 " 2-6 — 2*8 One perf. ; one 



imperfect. 



Manganese spar, 258 6*0 — 7*0 3*4 — 3*7 One perfect 



Axinite, 190 6-5—7-0 3-2—3-3 Imperfect. 



J Infusible. 



Kvanite, 173 5-0—7-0 3-5—3-7 Lat. distinct. 



Sillimanite, 172 7-0—7-5 3-2—3-3 Diagonal perf.!! 



6. CRYSTALS HEXAGONAL OR RHOMBOHEDRAL. 

 1. Luster unmetallic. 





* Soluble. 



Nitrate of soda, 



103 1-5—2-0 2-0—2-1 Rhomb, perf. 



Coquimbite, 



256 " Hexag. imperf. 





t Insoluble : infusible. 



Brucite, 



126 1-5 2-35 Foliated! 



Mica, (hexagonal) 193 2-0—2-5 2-8—3-1 Foliated!! 



Calc spar, 



115 2-5—3-5 2-5—2-8 Rhomb, peif ! 



Diallogite, 



261 3*5 3-5—3-6 Rhombohedral. 



Magnesite, 



124 3-0—4-0 2-8—3-0 Rhomb, perf. 



Ankerite, 



120 " 2-9—3-2 Rhomb, perf. 



Dolomite, 



118 3-5—4-0 3-5—4-0 Rhomb, perf. 



Spathic iron, 



247 " 3-7—3-9 Rhomb, perf. 



Alum stone, 



129 5-0 2-6 — 2-8 Basal, near perf. 



Dioptase, 



301 » 3-2—3-3 Rhombohedral. 



Quartz, 



132 7-0 2-6—2-7 Imperfect. 



Sapphire, 



158 9-0 3-9 Basal, perf. 





X Insoluble : fusible, without fumes. 



Chlorite, 



145 1-5—2-0 2-6—2-9 Foliated! 



Chabazite, 



169 4-0 — 4-5 2-0—2-2 Rhombohed. ma. 



Apatite, 



120 5-0 3-0 — 3-3 Indistinct. 



Nepheline, 



179 5-5—6-0 2-4—2-7 Imperfect. 



Tourmaline, 



187 7-0—8-0 3-0—3-1 Indistinct. 



Reryl, 



197 7-5—8-0 2-6—2-8 Basal, indistinci 





35* 



