660 MINERALOGY 



Babingtonite, (Ca.Mn.Fe)Si0 3 .Fe 2 (SiO 3 )3; Greenish 



black to black ; H. 5.5-6 ; G. 3.36 ; F. 3-3.5 ; VI. 

 ACMITE, NaFe(Si0 3 ) 2 ; Greenish to brownish black; 



Cl. prismatic; H. 6-6.5; G. 3.50; V. 

 HYPERSTHENE, (Mg.Fe)SiO 3 ; Greenish black to 



bronze-brown ; Cl. pinacoidal ; H. 5-6 ; G. 3.45 ; 



F. 5; IV; p. 421. 

 2. Yields water. 



BIOTITE, (K.H) 2 (Mg.Fe) 2 (Al.Fe) 2 (Si0 4 ) 3 ; Green to 



greenish black; C. basal; H. 2.5-3; G. 2.90; 



F. 5 ; V ; p. 492. 

 Chloropal, H 6 Fe 2 (Si0 4 ) 3 .2 H 2 ; Greenish yellow to 



pistachio-green ; H. 2-4 ; G. 3.87 ; F. Difficult ; 



Amorphous. 

 Compare minerals containing small amounts of iron in 



sections below, some of which may at times become 



magnetic. 

 VIII. After intense ignition in the forceps, it yields an alkaline 



reaction with turmeric paper, hardness below 5. 

 .4. Effervesces with hot dilute HCl, and dissolves, leaving little or 



no residue when pure (carbonates). 



1. After intense ignition in the forceps it yields a green flame 



(barium). 

 WITHERITE, BaC0 3 ; White to gray ; H. 3.5 ; G. 4.3 ; 



F. 2.5-3 ; I V ; p. 394. 



BARYTOCALCITE, BaCa(C0 3 ) 2 ; White, gray, ye41ow, 

 green ; Cl. prismatic ; H. 4 ; G. 3.65 ; F. Difficult ; 

 V ; p. 395. 



Bromlite, (Ca.Ba)CO 3 ; White, gray, cream ; H. 4-4.5; 



G. 3.72; F. Difficult; IV. 



2. It yields a red flame (strontium). 



STRONTIANITE, SrC0 3 ; White, gray, yellow, green; 

 Cl. prismatic ; H. 3.5-4 ; G. 3.70; IV; p. 395. 



3. After intense ignition it yields a carmine flame (calcium). 



CALCITE, CaCO 3 ; White and variously tinted; Cl. 



rhombohedral ; H. 3 ; G. 2.72 ; Inf. ; III ; p. 379. 

 ARAGONITE, CaCO ;! ; White and variously tinted; 



Cl. pinacoidal ; H. 3.5-4 ; Inf. ; IV ; p. 392. 

 DOLOMITE, CaMg(CO 3 ) 2 ; White and variously tinted ; 

 Cl. rhombohedral ; H. 3-4 ; G. 2.85 ; Inf. ; III ; p. 386. 

 a. Yields a fluorine reaction; a, p. 589. 



