m:i.o\\, HARDNESS ABOVE 5 675 



SODALITE, Na 4 (AlCl)Al 2 (SiO 4 )3 ; White, gray, blue, 

 green ; H. 5.5-6 ; G. 2.30 ; F. 3.5 ; I ; p. 438. 



**. Yields a strong sodium flame, l>ut no chlorine. 



NEPHELITE, (Na 2 .K 2 .Ca) 4 Al 8 Si 9 O, 4 ; White, gray, 

 greenish, reddish ; Cl. prismatic ; H. 5.5-6 ; G. 2.6*0 ; 

 F. 4 ; III ; p. 440. 



***. Yields calcium; 6, p. 566. 



ANORTHITE, CaAl 2 (SiO 4 ) 2 ; White, gray; Cl. basal 

 and pinacoidal; H. 6-6.5; G. 2.75; F. 4.5; VI; 

 p. 413. 



MELILITE, Si, Al, Fe, Ca, Mg, Na, O? ; Green, yellow, 

 brown, white ; Cl. basal ; H. 5 ; G. 3.00 ; F. 4 ; II ; 

 p. 451. 



Sarcolite, (Ca.Na^sA^SiO^s ; Flesh to rose-red, 

 white ; H. 6 ; G. 2.7 ; F. 3 ; II. 



y. Contains no aluminium. 



*. Shows calcium, 6, p. 566. 



WOLLASTONITE, CaSIO 3 ; White, gray; Cl. pina- 

 coidal ; H. 5-5.5 ; G. 2.85 ; F. 4 ; V ; p. 429. 



**. Shows zirconium; a, p. 571. 



Hiortdahlite, (Na2.Ca)(Si.Zr)O 3 ?; Straw-yellow to yel- 

 lowish brown; H. 5.5-6; G. 3.26; F. 3 ; VI. 

 c. Insoluble in HC1. 



. Yields a red flame in the forceps (lithium). 



SPODUMENE, (Li.Na)Al(SiO 3 ) 2 ; White, gray, pink, 

 green; Cl. prismatic; H. 65-7; G. 3.18; F. 3.5; 

 V ; p. 426. 



PETALITE, (Li.Na)Al(Si 2 O 5 ) 2 ; White, gray, pink; 

 Cl. basal; H. 6-6.5; G. 2.40; F. 4; V; p. 

 426. 



/3. Yields a potassium flame through the blue glass when 

 fused with potassium flux; a, p. 563. 



ORTHOCLASE, KAlSi 3 O 8 ; White, gray, cream, flesh- 

 red, green; Cl. basal and pinacoidal; H. 6; G. 

 2.57 ; F. 5 ; V ; p. 403. 



MICROCLINE, Same, but VI, p. 409. 



Yields a little water in the closed tube at a high tem- 

 perature. 



Milarite, HKCa2Al 2 (Si 2 O 5 )6; White to pale green; H. 

 5.5-6; G. 2.55; F. 3; III 



y. Yields a strong sodium flame in the forceps. 



