Ixxii 
MANGANESE DEPOSITS OF INDIA. 
manganiferous variety intermediate between grossularite and andradite. 
On the same principle this garnet should be called mangan-grandite, or 
more convenientlv grandite. 
Calderite. — This name was proposed by Piddington for a rock 
from the Hazaribagh district, Bengal, composed of a mixture of 
quartz and garnet, in which the quartz may sometimes be absent. 
The analysis given indicates a garnet of the composition 3MnO. 
Fe203.3Si02, which is not one of the six recognized varieties. It is 
not certain, however, that such a garnet really exists. 
[CHAPTER VTI.] 
Silicates : Epidotes, Micas, etc. 
Piedmontite. — Manganiferous epidote.? have been found at severa 
localities in the Central Provinces, and at Kajlidongri and Jothvad. 
None of them have been really critically examined, so that it cannot 
be said at present if all of them are to be regarded as piedmontite, or 
if some of them are mangan-epidote, the distinction between these two 
minerals being a question of sign. Throughout this Memoir all these 
minerals are referred to as piedmontite. The only examples showing 
well-marked crystal forms come from Jothvad. 
Micas. — A very large number of micaceous minerals has been 
found in the Indian manganese-ore deposits, especially those of the 
gondite series. None of them have been quantitatively analysed, so 
that it is not at present possible to say if they all fall under already- 
described varieties, or not. Judging from their pleochroism schemes I 
should say that some of them are probably new varieties, whilst some 
fall under alurgite and manganophyllite. Some may be mangan-chlorite. 
At two localities — Chikhla and Balaghat — ottrelite has been found in 
phyllites and mica-schists. 
[CHAPTER VIII.] 
Titano-silicates, Niobates, Phosphates, and Tungstates. 
The rare manganiferous variety of sphene known as greenovite 
occurs in granitic veins traversing the manganiferous rocks at J othviid 
in Narukot. 
