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MANGANESE DEPOSITS OP INDIA: MINERALOGY. [pART I : 
It must not,, however, be imagined that the above are the only 
localities at which good crystals are to be found. I have myself also found 
them at several other locaUties ; whilst Mr. E. L. Young showed me a 
large number of specimens of trapezohedral crystals obtained at the 
Lohdongri mine, Nagpur district, and Mr. C. E. Low has found good 
crystals of imusual form in Government Forest about one mile west of 
Kudsuri village in the Balaghat district. 
As will be judged from the above, the crystaUine habit of this mineral 
Crystallographic characteristically trapezohedral (or icosatetrahedral), 
character. usually without any modif}dng faces (see fig. 13). The 
faces of the trapezohedron are, however, usually 
striated with a delicate series of lines, which are parallel both to the faces 
of the dodecahedron and to certain of the edges of the hexoctahedron. 
This is well illustrated by fig. 14, which represents a crystal of this mineral 
from Chargaon. It is the best crystal of this mineral I have found and is 
Fig. 13. Fig. 14. Fig. 15. 
Spessartite Crystals. 
Fig. 13 — Trapezohedron ; Bichua and Waregaon. 
Fig. 14. — Striated trapezohedron ; Chargaon. 
Fig. 15. — Trapezohedron and dodecahedron ; Waregaon. 
nearly | inch in diameter, showing aU twenty-four faces of the trapezohe- 
dron. Another almost equally perfect crystal from the same place is 
J inch in diameter. Sometimes, but only rarely, the corner A of the 
trapezohedral crystal is modified by the presence of the faces of the 
dodecahedron, d, or (110), as in fig. 15. These are usually small in propor- 
tion to the size of the trapezohedral faces, but in one case I found a 
manganese-garnet in which the latter faces were absent, the crystal being 
a simple dodecahedron (see fig. 16). This was in a pegmatite composed of 
quartz, felspar, pale sea-green mica, and manganese-garnet, occurring near 
Kachi Dhdna, Chhindwara district. The garnet is of reddish brown 
colour, but on account of its mode of occurrence it is not known 
