Chap. XXXIV.] 
CHHINDWARA : DEVI. 
701 
composed of rose-pink rhodonite and orange spessartite. There is, 
moreover, much quartz banding in the ore and manganese-silicate-rocks ; 
and in places this quartz contains manganese-garnets up to half an inch 
in diameter. These rocks are often blackened owing to the partial con- 
version of the rock into manganese-ore ; but the alteration has only in 
a comparatively few places proceeded sufficiently far for the alteration 
product to be an ore of manganese ; even in those places the amount of 
ore is small. This ore is partly hard and partly soft and is brownish 
black in colour. The limestone adjoining the ore-band is often of the 
black variety, which, as usual owes its colour to manganese oxide depo- 
sited along the cleavage and twinning planes of the calcite. It also con- 
tains small altered grains of rhodonite l. 
I collected a sample along the outcrop to the eaft of the nala bisecting 
the ore-band, from any points where it looked as if the ore was of possible 
value. The sample was assayed at the Imperial Institute with the fol- 
lowing result : — 
Sample No. 13. 
Manganese peroxide .. .. .. .. 38 "87 
Manganese protoxide .. .. .. .. 32*70 
Ferric oxide .. .. .. .. .. 10'05 
Combined silica .. .. .. .. 4*98 
Free silica .. .. .. .. .. 0-CO 
Phosphoric oxide .. .. .. .. 0"65 
Moisture at 100°C. .. .. .. .. 1-27 
Carbon dioxide .. .. .. .. 0'04 
This is equivalent to : — 
Manganese .. .. .. .. .. 48*95 
Iron ..' .. .. .. .. 7-03 
Silica (total) .. .. .. .. .. 4-98 
Phosphorus .. .. .. .. .. 0-283 
Judging from this analysis it seems as if a small quantity of phosphoric 
manganese-ore, which is not quite up to first grade as regards manganese, 
may he obtained from this deposit. But until a railway has been cons- 
tructed through the valley of the Kanhan it is not probable that it will 
pay to extract this small quantity of inferior ore, even when the prices 
rule as high as the)'^ did in 1906. 
1 Eec. G.S.I., XXXIII, p. 201, (1906). 
