156 SYSTEMATIC DESCRIPTION OF PRECIOUS STONES 



Bahia, which came into special prominence in the later decades of the'nineteenth century. 

 The yield of other States, compared with that of the two above mentioned, is unimportant, 

 but all are as yet too little explored to permit of a final opinion as to their capabilities. 



Fig. 34. Diamond-fields of Brazil. (Scale, 1 : 10,000,000). 



Minas Geraes and Bahia are, however, the only States of commercial importance in respect 

 to the amount and continuity of their production of diamonds, it being doubtful whether 

 stones are found in anything but insignificant numbers in other States. 



The important diamond-bearing districts of Minas Geraes and Bahia are shown in the 

 accompanying map (Fig. 34) taken from Boutan. It is proposed now to deal with Brazilian 

 occurrences, taking the different States in the order of their relative importance, and treating 



