TAHLE I. FOB DETERMINATION OF MINERALS. 419 



d. Hot acted on by acids, or partially soluble whhout forming a jelly. 



t Infusible. 

 Hardness. 

 Talc, 143. 10— 1-5 VI; foil mas; G 2-7—2-9- light gn, gnhw gyh, 



p'ly, unctuous ; laminae flexible, inelastic. JVtwt 

 Pyrophyllitc, " Fol ! gran ; apple-gn, vv, bnh-gn, ywh ; p'ly ; strp, 



strl : Dl, swdls up I Prim. 

 Mica, 191. " Fol !l lam. thin elastic, tough; G 2b — 3; colors 



various, often bright ; p'ly ; trp, strl : Bl. fua dif I 



Prim, etc. 

 Chrysocolla, 300. 2-0—3-0 mas, bot ; G 2—2-3 ; bluish-gn ; smooth vit, or ear- 



thy ; strl, op ; nit sol, except silica . 

 Gibbsite, 131. 30—3-5 Stalact, crusts ; G 2-3—2-4 ; gyh-w, gnh-w ; dull. 



Emerald nickel, 264. 30—3-5 minute globular, crust ; G 305 ; emerald-gn ; St 



paler -, vit ; trp, trl ; Bl, loses its color. 

 Blende, 269. 3-5 — 40 I ; dodec cleav, mas ; G 4 — 4-1 ; resin-y w, bn, bh, w 



rdh ; trp — op : Bl, bor inf. 

 Plumbo-resinlte, 285. 40 — 4-5 reniform ; G 6-3 — 6-4 ; ywh, bnh, rdh; resinous, or 



like gum arabic ; til ; Bl, decrep ; enam on char. 

 Cllntonite, 148. 4 0—50 IV ; fol 1 lam brittle ; G 3—3-1 ; rdh-bn ; met-p'ly ; 



strl : Bl, bor trp pearl. 

 Alum stone, 129. 5-0 III ; acic, stel, mas ; G 26 — 2-8 ; vit, p'ly, earthy ; w, 



rh, gyh ; sui, mostly sol : Bl, decrep ; soda infus. 

 Monazito, 206. 50 IV ; imbedded, cryst, cleav I in one direction ; G 



48 — 5-1; bn, bnh-r ; vit, res; strp, op ; brittle; 



mux, decomposed. Prim. 

 Leucite, 175. 5-5 — 60 I ; trapezohedrons ; G 24 — 2-5 ; w, gyh ; vit ; strp. 



trl : Bl, bor, fus dif. Vole. 

 Anatase, 211. " II ; in cryst ; G 3-8—3-9 ; fine bn, b ; met-ad, res ; 



strp, trl : Bl, loses col ; bor fus dif. Prim. 

 Turquois, 130. 60 Reniform ; G 28—3 ; b, bh-gn ; waxy, dull ; trl, 



op : Bl, flame green ; bor, fus. 

 Opal, 139. 5-5 — 6-5 Massive, uncleav ; w, yw, r, bn, gn, gy, pale ; in 



some a play of colors ; vit, p'ly ; trp, strl : Bl, 



decrep, op. 

 Kyanite, 173. 5-0—70 V ; in prisms or bladed cryst ; G 3-5—3-7 ; b, w, 



bnh ; p'ly, vit ; trp, 6trl : Bl, bor fus dif, trp. Prim. 

 Nephrite, 147. 6-0— 7-0 Mas, subgran ; G 29 -31 ; leek-gn, bh, wh ; vit ; trl, 



strl : Bl, whitens ; bor clear glass. Prim. 

 Bucholzitft 172. u Col, fib; G 3-2—3-6; w, gyh, bnh; p'ly; trl, strl- 



brittle. Prim. 



Tin ore, 214. " II ; mas, fib ; G 6-5 7-1 ; bn, bk. w, gy, r, yw ; ad, 



• res, cryst often brilliant ; strp, op : Bl, bor on 



>- char with soda aflbrds tin. Prim. 



Chrysolite, 15£. 6-5—7-0 111 ; imbeded grains or masses of a glassy appear- 



ance ; G 33 — 3-6 ; gn, bottle glass gn : Bl, darkens 



bor gn glass ; [rarely "usible.] Basalt, etc. 

 eOlimanite, 172. 65— 7-5 V ; col, fib ; G 3-0— o-4 bn, gyh ; p'ly, vit ; trl, strl 



brittle : Bl, bor infus. Prim. 

 Andaluslto, 174, - III ; stout prisms ; mas ; G 2-9—3 2 ; vit p'ly ; gy** 



