422 TABLE I. FOR DETERMINATION OF MINERALS. 



Lapis Lazuli, 

 Feldspar, 



Labradorite, 



Chondrodite, 



Obsidian, 

 Manganese spar, 

 Petalite, 



Idocrase, 



Hardness, 

 196. 5-5—60 



176. 6-0 

 \TJ. 6-0 



178. 60 



157. 55— 6-5 



341. 5-5— 6-5 

 239. 5-5—70 

 192. 60—6-5 



184. 6-5 



Prehnite, 



170. 6-0-6-5 



Epidote, 



182. 60—70 



Spodumene, 



156. 6-5—70 



finite, 



190. 



Garnet, 



184. 6-5—7.5 



Boracite, 



126. 7.0 



Iolite, 



190. 70 



Tourmaline, 



187. 70— 80 



Euclase, 



199. 7 5 



fcryl, 



197. 7-5-80 



Ijdodec; mas; G 2-5 — 20; rich b; vit; trl— op. 

 Bl, fus, trl or op glass. 



IV ; cleav, mas ; G 23— 20 ; wh, gyh, rb, bh, gnh, 

 p'ly, vit ; trp, strl ; mur, no action : Bl, fus dif, 

 bor trp glass. 



V ; cleav, mas ; G 26— 2-7 ; w, gyh, gnh, ih, bh ; p'ly, 

 vit ; trp, strl ; mur, no action : Bl, fus dif ; flame 

 yellow; may generally be distinguished from 

 feldspar by its purer white color. 



V ; cleav, mas ; G 26 — 28 ; chatoyant, gy, gnh, bn, 

 rdh-bn .- p'ly, vit; strl; hot mur decomp : Bl, 

 fus easily, colorless glass. Prim. 



IV ; gran mas ; G 3-1 — 3-2 ; ywh, bnh-yw, rh, gnh • 



vit, res ; trp, strl ; brittle : Bl, fus dif!.' bor fus ! 



ywh-gn. Gran limestone. 

 Mas, like glass ; G 2-2—28 ; bk, gy, gn ; vit, p'ly 



Bl, fus. 

 V ; mas ; G 3-4 — 3-7 ; flesh-r, dark bn on exposure ; 



vit ; trp, strl : Bl, fus bkh glass ; bor violet. Prim. 

 Cleav mas, gran ; G 2-4 — 2*5 ; w, bh, rh, gnh ; vi^ 



p'ly ; trl ; phosphoresces . Bl, fus ; bor trp glass. 



Prim. 

 II ; mas ; G 33 — 3-4 ; bn, gn, w ; vit, res, cryst often 



brilliant ; trp, strl : Bl, fus 1 trl glob. Prim ; vole ; 



gran limest. 

 Ill ; bot, mas ; G 28—3 ; light gn, w; vit, ply; trL 



strl ; tough ; mur sol, exc't silica : Bl, fus. Amyg, 



IV ; mas, gran, col ; G 30 — 3-5 ; ywh-gn, gy, bn, bh, 

 rh ; vit, p'ly ; trp, op : Bl, fus. Prim, etc. 



Cleav mas, gran ; G 31 — 3-2 ; gyh-w, gnh ; ply : Bl 

 fus, intum, exf, colorless glass. Prim. 



V ; cryst acute-edged ; Gr 3-2—3-3 ; deep bn ; vit 

 brilliant ; trp, strl : Bl, fus ! intum dark gn glass ; 

 Prim, etc. 



I ; cryst, mas, gran ; G 3-5 — 4-3 ; r, bn, w, gn, bk, 



often bright ; vit, res ; trp, trl : Bl, fus, no efferv 



bk glob. Prim, etc. 

 I ; hemihed cubes ; G 20—3 ; w, gyh ; vit, ad ; strp 



trl ; pyro-electric : Bl, fus, intum. Gypsum. 

 m;mas, glassy; G 20—28; b, gyh-b, bnh ; trp. 



trl : Bl, fus dif ! bor trp, glass. Prim. 

 VI ; col, mas ; G 3—3-1 ; bk, bn, gn, r, b, w, ofte» 



bright ; vit, res ; trp, op ; pyro-electric : Bl, fus 



intum. Prim, etc. 

 IV ; in crystals, cleav ; G 20—3-1 ; pale-gn, b, w . 



vit, brilliant ; trp, strl: Bl, fus dif! intum. Prim 

 VI ; hexag pms, mas ; G SO— 28 ; gn, bright oi 



dull.bh, ywh ; trp, strl: Bl, fus dif; bor trp glass 



Prim. 



