150 MIDDLEMISS: THE GEOLOGY OF IDAR STATE. 



zite near Meghraj in the form of pyrolusite (see p. 115), man- 

 ganese ores occur near Vartlia in an impregnation belt among 

 the Delhi Quartzite as described (see p. 105). Although the 

 belt is fairly wide and the surface indications prolific, the exposure 

 are so poor that without deep trenching it is impossible to Bay 

 whether the slight but extensive evidence of metasomatic replace- 

 ment of the Delhi Quartzite by ferruginous and manganiferous 

 solutions will anywhere be found to denote an ore of marketable 

 value. The locality might well be worth further testing. 



Mica : Muscovite mica is only known at a few places, as in 

 the pegmatite veins at Bodi (p. 63). The mica plates being 

 small (I inch to 1| inches across) and the pegmatite veins few and 

 thin, it is doubtful whether any economic importance attaches 

 to these deposits. 



Pyroxene : Extensive beds of white or pale grey pyroxene have been 

 described near Bamanvada (p. 67). It may have some value 

 as an ornamental stone for small carved work on account of its 

 pleasing colours and faint translucency. With it occurs iremolite 

 (see p. 69) which occasionally becomes rather compact, form- 

 ing a very rough jade-stone. Small quantities only are known 

 and the quality is much below that of true jade. 



Pyrolusite : See Manganese. 



Quartz Veins : These have been briefly described at p. 129. 

 Their striking features and the large scale on which they are deve- 

 loped are however only equalled by the total absence in them of 

 any economic minerals, so far as exposed. Rose quartz of a rather 

 pale variety is known at Reda (see p. 73). 



Rare Earths : Minerals of the rare earths are represented by 

 allanite, rather abundantly developed in an aplite vein near Khed 

 Brahma (see p. 40) and by a few grams of monazite detected 

 in the sands collected from the larger river-beds. 



Steatite, Serpentine, Talc : See Magnesian Minerals. 



