676 MINERALOGY 



ALBITE, NaAlSi 3 O 8 ; White to gray; Cl. basal and 



pinacoidal; H. 6; G. 2.62; F. 4; VI; p. 411. 

 See p. 403 for intermediate feldspars which may be of 



various colors. 

 JADEITE, NaAlSi 2 O 6 ; White, grayish green; Cl. 



prismatic ; H. 7 ; G. 3.33 ; F. 2.5 ; V ; p. 426. 

 Glaucophane, Na2Al 2 (Si0 3 ) 4 .Mg 4 (SiO 3 ) 4 ; Lavender to 



azure-blue ; Cl. prismatic ; H. 6-6.5 ; G. 3.11 ; F. 3-4. 

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



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

 Eudidymite, HNaBeSi 3 O 8 ; White; Pearly; Cl. basal; 



H. 6; G. 2.55; F. 2.5-3; V; Tabular. 

 Shows chlorine, 587. 

 WERNERITE, Ca4Al 6 Si 6 2 5.Na4Al 2 Si 9 O24Cl ; White, 



gray, light green; Cl. prismatic; 2.5-6; G. 2.68; 



F. 3 ; II ; p. 453. 

 Marialite, Na 4 Al3Si 9 O 24 Cl ; White ; H. 5.5-6 ; G. 2.56 ; 



F. 3-4 ; II. 



8. Yields test for aluminium and calcium ; 6, p. 566. 

 *. Fuses quietly. 

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



and pinacoidal ; H. 6 ; G. 2.75 ; F. 4.5 ; VI ; p. 413. 

 GROSSULARITE, Ca 3 Al 2 (SiO 4 )3 ; Pale red, yellow, 



green, white; H. 6.5-7.5; G. 3.50; F. 3; I; p. 443. 

 HORNBLENDE, Complex silicate ; Green to black ; Cl. 



prismatic; H. 6 ; G. 3.15; F. 3-4; V; p. 431. 

 AUGITE, Complex silicate; Greenish black to black; 



Cl. prismatic ; H. 57 ; G. 3.30 ; F. 4-4 5 ; V ; p. 418. 

 **. Fuses with intumescence. 

 PREHNITE, H 2 Ca2Al 2 (SiO 4 ) 3 ; Apple-green, gray, white ; 



H. 6-6.5; G. 2.9; F. 2.5; IV; p. 470. 

 VESUVIANITE, Complex silicate; H. 6.5; G. 3.40; 



F. 3 ; II ; p. 455. 

 EPIDOTE, Ca2(AlOH)(Al.Fe) 2 (SiO 4 )3; Yellowish to 



blackish green, gray ; Cl. basal ; H. 6-7 ; p. 466. 

 ZOISITE, Ca2(A10H)Al 2 (SiO 4 ) 3 ; Grayish white, green, 



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



V; p. 465. 

 Clinozoisite, Ca2(A10H) 2 (Al)(SiO 4 ) 3 ; White to pale 



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



p. 465. 





