28 



Account of Minerals 



[July 



112. — Asbestiform tremolite, found in veins, with adularia and magne- 

 tic iron ore in mica slate— Adepuram, Nellore mining district. It occurs 

 in minute diverging fibres, with silky lustre, often stained by oxide of 

 iron, frangible, scratches glass with difl5culty, phosphoresces slightly, and 

 whitens before the blow-pipe. 



113. — Adularia associated with the above ; scratches glass, lustre 

 splendent, rather vitreous on the perfect planes, and pearly on the broader 

 lateral planes. Before the blow-pipe, per se, it whitens and fuses on thin 

 edges into a transparent glass. It is about 6° hardness of Mobs. 



114. — Do. imbedded in kunker — same locality as the above. 



115. — Variety of iron ore, resembling externally the titaniferous iron 

 ore of the Neilgherries ; after exposure to a red heat it becomes magnetic. 

 It occurs in compressed laminae, in seams of a gametic quartz bed in the 

 mica schist at Kunchgarlconda— Nellore. 



116. — Gametic quartz bed in mica schist — Kunchgarlconda. 



117. — Honey-combed quartz: most of the cavities are filled or lined 

 with an orange brown powder, which, before the blow-pipe, blackens and 

 becomes magnetic. 



118. — Quartz with magnetic iron ore foliated, garnets and mica, and 

 exhibiting traces of copper, Ademulepuram — Nellore. 



119. — Do. do. with rhombic dodecahedral garnets, resembling 

 essonite. 



120. — Granular garnet rock— same locality. This rock from its appar- 

 ent weight, hardness, colour and tendency to take a crystalline form, 

 might easily be mistaken for granular corundum at first sight. It is 

 finely granular in structure, and has the appearance of a purplish red jasper. 

 It often occurs in nodules which assume a rudely dodecahedral form or 

 prisms, with three sided summits. It occurs in beds in the hornblende 

 and mica schists of the Nellore mining districts, near Gurumanypenta, 

 associated with asbestiform tremolite and adularia. Like precious gar- 

 net, it fuses, per se, before the blow -pipe into bluish black enamel. 



121. — Red mineral in shining plates, resembling felspar, between 

 laminae of mica schist, base of Udeghirry mountains— Nellore. Softer than 

 felspar, streak reddish white. Before the blow-pipe, per se, ftises easily 

 ■with intumescence and phosphorescence, and curling up into a white enamel ; 

 with phosphate of soda into a topaz coloured glass, which becomes 

 colourless on cooling, and with borax into a faint greenish glass, which 

 also loses its colour on cooling. 



122. — Pale rose coloured quartz — same locality. 



123. — Gravel, brought down by mountain torrentvS, containing rolled 

 and angular fragments of iron ore, garnets, schists, and copper ore. 



