250 GEOGNOSY OF INDIA. 



■was brought from India, it was very probably found in the 



^^^^Zirc'on.— Fine specimens of this gem are met with in 

 alluvial deposites in the district of EUore. 



5. Schorlous Topaz.— Th\s interesting variety of topaz is 

 mentioned by Dr. Heyne as occurring in different localities 

 in syenite and granite districts. • , . 



6 Schorl and Tourmaline occur in granite, mica-slate, 

 and"in quartz-rock, bordering the granite and syenite dis- 



• ^7^'chrvsolUe.— This gem occurs in the basaltic rocks of 

 the secondary trap series in the great trap district already 



described. , . , , . 



8. Precious Garnet.— In many hills this gem abounds in 

 syenite, in others it is imbedded in mica-slate and gneiss. 



9. Pi/ropc.—This beautiful mineral, the finest gem ot the 

 garnet "family, is mentioned by Heyne as having been met 

 with among "the primitive rocks of the central parts of the 



^^^O.^Grcnatite has been found in the southern parts of the 



Mysore. . . , . 



11. Rock Crystal, and other varieties of quartz, occur m 

 the granite, mica-slate, and quartz-rock districts. _ 



12 imetht/.ft.— This beautiful kind of quartz is met with, 

 in greatest beauty, in drusy cavities of overlying trap mthe 

 .-o-reat northern trap district. 



"^ 13 Cat's Eye. Varieties of this ornamental quartz are 



found in the alluvium of the river Krishna, also on the 

 coast of Malabar. 



14. CarneUatu— Mines, as they are called, ot this orna- 

 mental stone occur in the principality of Rai Beempla, 

 about thirty miles due east of Broach, and about five miles 

 «n the southern bank of the Nerbudda. The stones are 

 obtained by sinking pits during the dry season m the chan- 

 nels of torrents. The nodules which are found in this way 

 are intermixed with other rolled pebbles, and weigh fi-om a 

 few ounces to several pounds. Their colour, when recent, 

 is dark olive-green, inclining to greenish-gray. The prepa- 

 lation which they undergo is, first, exposure to the sun 

 for some time, and then calcination. The latter process is 

 performed bv packing the stones in earthen pots, and cover- 

 ing them with a laver five or six inches thick of dried goat s 



