CASSITERITE CRYSTALS. 



73 



PHEASANT GREEK, (Fig. 8). 



A doublet from this locality was examined and has proved 

 of unusual interest. 



Only about half the crystal is developed ; it measures 

 3x2 mm., and is black in color with reddish patches. The 

 faces are smooth and very bright giving excellent reflec- 

 tions, and striations are entirely absent. 



The prism zone in both individuals is well developed; the 

 forms represented are the commonly occurring a (100), 

 h (120), r (230), and m (110). The pyramids s (111) and 

 z (231) are present, and also the very uncommon forms 



ANGLES. 



Forms. 



$ 



Measured. 

 P 





* 



Calculated. 

 P 



a 



100 







03 



o 



90 



00 







00 



O / 



90 00 



h 



120 



26 



28 



5> 



26 



34 



m 



r 



230 



33 



36 



> 



> 



33 



41 



> j 



m 



110 



45 



08 



} 



> 



45 



00 



>j 



s 



111 



45 



08 



43 



34 



45 



00 



43 33 



z 



231 



33 



46 



67 



36 



33 



41 



67 35 



N 



241 



26 



43 



71 



12 



26 



34 



71 36 



M 



8.15.4 



28 



15 



70 



50 



28 



04 



70 40 



R 



13.17.6 



37 



20 



67 



42 



37 



24 



67 22 



a 



100 







14 



22 



15 







00 



22 12 



I 



120 



37 



04 



34 



17 



37 



05 



34 06 



r 



230 



29 



51 



39 



36 



29 



32 



39 36 



m 



110 



20 



42 



49 



11 



20 



41 



49 06 



z 



231 



\ 6 



1 38 



47 



30 



50 



7 



00 



31 06 



z 



231 



25 



55 



11 



38 



32 



55 23 



s 



8 



111 

 111 



{ 45 

 1 l9 



19 

 49 



43 



79 



46 

 54 



45 



29 



00 

 40 



43 33 



79 48 



£ 



241 



J 2 



40 



25 



21 



2 



42 



25 11 



N 



241 



\ 35 



19 



47 



01 



35 



17 



47 17 



