674 MINERALOGY 



c. Insoluble or not decomposed in HCl. 



. In the forceps yields a yellow flame (sodium). 

 Epididymite, HNaBeSi 3 O 8 ; White; Cl. basal; H. 6; 



G. 2.55 ; F. 2.5-3 ; IV. 

 Eudidymite, HNaBeSi 3 O 8 ; White; Cl. basal; H. 6; 



G. 2.55 ; F. 2.5-3 ; V ; Tabular. 

 /3. Does not yield a strong sodium flame. 

 EPIDOTE, Ca2(Al.OH)(Al.Fe) 2 (SiO4)3; Yellowish to 



blackish green, gray ; Cl. basal ; H. 6-7 ; G. 3.40 ; 



F. 3-4 ; V ; p. 466. 

 ZOISITE, Ca2(A1.0H)Al 2 (Si0 4 ) 3 ; Grayish white, pink, 



green ; Cl. pinacoidal ; H. 6-6.5 ; G. 3.26 ; F. 3-4 ; 



IV ; p. 465. 

 Clinozoisite, Ca2(Al.OH)Al 2 (SiO 4 )3 ; White to pale 



pink ; Cl. basal ; H. 6-7 ; G. 3.37 ; F. 3-4 ; V. 

 Lawsonite, Ca(A1.2 OH)(SiO 4 )3 ; Grayish blue to white ; 



Cl. pinacoidal ; H. 8 ; G. 3.09 ; F. 4 ; IV. 

 . Yields no water in the closed tube. 



a. Decomposed in HCl with separation of silica, but with- 



out gelatinizing. 

 LABRADORITE, CaAlSi 3 O 8 ; White, gray; Cl. basal 



and pinacoidal ; H. 6 ; G. 2.73 ; F. 4 ; VI ; p. 416. 

 WERNERITE, Ca 4 Al 6 , Si 6) O 2 5.Na4Al3Si 9 2 4Cl. ; White, 



gray, light green; Cl. prismatic ; H. 5.6 ; G. 2.68; F. 



3 ; II ; p. 453. 



b. Gelatinizes with HCl. 



. Yields a sulphur reaction with soda and a sodium 



flame in the forceps. 

 LAZURITE, (Na2.Ca) 2 (Al.Na.S 3 ) Al 2 (SiO 4 ) 3 ; Deep azure 



to greenish blue; H. 5-5.5; G. 2.42; F. 3.5; I; 



p. 438. 

 NOSELITE, Na 4 (Al.NaS0 4 )Al 2 (Si0 4 ) 3 ; Gray, green, 



blue, brown ; H. 5.5 ; G. 2.32 ; F. 3.5-4 ; I ; p. 438. 

 HAUYNITE, (Ca.Na2) 2 (Al.NaSO 4 ) Al 2 (Si0 4 ) 3 ; Blue, 



green, yellow, white; H. 5.5-6; G. 2.45; F. 4; I; 



p. 438. 



Microsommite, Si, Al, Ca, Na, K, O, Cl, (S0 4 ), (C0 3 ),?; 

 White ; Cl. prismatic ; H. 6 ; G. 2.44 ; F. 3.5 ; III. 

 /?. Shows aluminium, 6, p, 568. 



*. Shows chlorine ; a, p. 588. Yields a sodium flame 

 in the forceps. 



