l i 3IBILIT* \l',o\ l.. II IRDNE88 BELOW :. 077 



e. Shows :iluiiiiniiiin and niaune-iinii, Iml 1'ttle or no 



calcium ; l>, p. .~>('>7. 

 PYROPE, Mg.v\l,(Si<),),;d<--pr.-d; II. r,.:, 7 .:, - , 



!'. 3.6 I : I : p. II:;. 

 . Shows calcium and ma^iie-ium, luil lit t le or no alu- 



iniiiiuiM ; //, p. .~>i>7. 

 TREMOLITE : ( ':iMg : ,(Si< ),) , ; White, gr;iy, violet; Cl. 



prismatic;. H. 5-6; G. :*.(); V. ! ; V ; p. 131. 

 DIOPSIDE, CaMg(Si( ).-),.; White to pale given; II. 



r> (i; (J. 3.29; F. 4; V; p. J'J:;. 

 PYROXENE, Ca(MK.Fc)(Si() 3 ) 2 ; Light to dark gn-ni ; 



Cl. prismatic; H. 5-6; G. 3.3; F. 4; V; p. 419. 

 ACTINOLITE, Ca(Mg.Fe) 3 (SiO 3 ) 4 ; Various shades of 



grrcn; Cl. prismatic; H. 5-6; G. 3.10; F. 4; V; 



p. 4;u. 



17. Shows magnesium and iron, but little or no calcium, 



6, p. 567. 

 ANTHOPHYLLITE, (Mg.Fe)Si0 3 ; Gray, clove-brown 



to given: Cl. prismatic; H. 5.5-6 ; G. 3.10; IV. 

 ENSTATITE, (Mg.Fe)SiO 3 ; Gray-brown to green; 



Pearly, bronze-like ; Cl. pinacoidal ; H. 5.5-6.5; G. 



3.20 ;F. 5-6; IV; p. 421. 

 0. Shows magnesium, but no silica. Reacts for fluorine ; 



a, p. 589. 

 Sellaite, MgF 2 ; White; Cl. basal; H. 5; G. 3.06; F. 



4-5; II. 



B. Fusibility above 5. 

 1. Hardness below 5. 



+ . Yields water, 

 a. Soluble in HC1, or decomposed with the separation of 



silica. 



a. Yields a sulphur reaction with soda. 

 ALUMINITE, A1 2 (OH) 4 SO 4 .7 H 2 O ; White ; Dull ; 



H. 1-2; G. 1.66; V; p. 542. 

 Felsobanyite, A1 2 (OH) 4 SO 4 .2 A1(OH),.5 H 2 O; White to 



pearly; Cl. perfect; H. 15; G.2.33; III; Scaly. 

 Alumian, (A1 2 O)(SO 4 ) 2 ; White; H. 2-3 ; G. 2.7; III; 



Massive; Yields no water. 

 Yields a violet flame (potassium). 

 Lowigite, K(A1.2 OH) 3 (SO 4 ) 2 .1 H 2 O ; Straw-yellow ; 



H. 3-4; G. 2.58; Massive. 



