H 



SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 65 



Color Violet or Purple 



Pyroxene var. violan. 

 Spodumene var. kun- 



zite. 

 Tremolite var. hex- 



agonite. 



Hodgkinsonite 



Axinite 



Lepidolite 



Imitation amethyst 



(Mn-glass). 



Spinel 



Chlorite var. kocschu- 



beite, kammererite, 



etc. 



Dumortierite 



Corundum 



Garnet var. almandite. 



Fluorite 



Quartz var. amethyst. 



Diaspore 



Apatite 



Coloring 

 elements 



Mn" 

 Mn" 



Mn" 



Mn' 

 Mn" 

 Mn" 

 Mn" 



Co" 

 Cr'" 



Ti'" 

 Cr" 

 V'" 



+Ti' 



Red 



Orange 



To 680 

 To 650 



To 670 



To 660 

 To 670 

 To 670 

 To 650 



Yellow 



(580-570) 



(590-570) 



(580-570) 

 (590) 



(590) 



(590-560) 

 590-570 



(600 t 



Green 



56O-52O 



(545) 

 555-545 



540-520 5IO-49O 

 O 550) J ... 

 (520 to 490) 



Blue 



Violet 



440 on 

 440 on 



450 on 



450 on 

 460 on 

 460 on 

 430 on 



(460) 440 on 

 450 on 



430 on 

 450 on 

 460 on 

 440 on 

 430 on 

 450on 

 440 on 



Violet calcite and lanthanite are included in rare earth list. 



