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There was a fall of 8,314 tons in the output of gypsum,
from 54,404 tons valued at Rs. 98,366 (L7,396) in Gypsum.
1936, to 46,090 tons valued at Rs. 1,18,543 (£8,913) in 1937 with a rise in value.
TABLE 48.-- Quantity and value of Gypsum produced in India during
the years 1936 and 1937.
The output of kyanite and quartzite and similar rocks in Singhbhum district, Bihar, and Kharsawan State of the Eastern States
Agency, is partly for purposes of export, and Miscellaneous refrac. tory materials.
partly for use in India, such as for furnace
linings at Jamshedpur. The data for 1936 and 1937 are assembled in Table 49, from which it will be seen that there has been an increase in total output from 41,436 tons valued at Rs. 3,96,316 (£29,708) in 1936 to 47,542 tons, valued at Rs.7,44,398 (£55,970) in 1937. The niost valuable of these materials is kyanite extracted for export by the Indian Copper Corporation from Lopso Hill in Kharsawan. The quartz-mica-schist all came from Singhbhum district. Of the total production of 15,197 tons of quartzite, 14,362 tons came from Singhbhum district, and only 825 tons from Seraikela State,
TABLE 49.- Quantity and value of Miscellaneous Refractory Materials
produced in Bihar and Eastern States Agency during the years 1936 and 1937.
(a) Estimated. There was a decrease in the reported production of ochre from 6,298 tons valued at Rs. 36,557 (£2,749) to 5,977 tons valued at
Rs, 23,784 (£1,788) in 1937. Central India Ochre.
was mainly responsible for this Panna State producing only 119 tons in 1937, against 1,571 tons in 1936, and sohawal State produced 1,912 tons in 1937, against 593 tons in 1936. TABLE 50.-Quantity and value of Ochre produced in India during
the years 1936 and 1937.
After the liquidation of the Burma Ruby Mines, Limited, and the final cessation of the operations of this company in 1931,
there an interval during which reliable Ruby, Sapphire and statistics of production of gem-stones in the Spinel.
Mogok Stone Tract were unobtainable. Work, however, is still continued by local miners ; in addition a certain amount of work is being done under extraordinary licenses. For 1932 no returns were available, except that a fine ruby of 17 carats, a fine sapphire of about 90 carats and a good star sapphire of 453 carats were mined. For 1933 the only return was of 1,103 carats of rubies. For 1934, however, there was a reported production of 21,622 carats of rubies valued at Rs. 36,011 (£2,708) and 153 carats of sapphires valued at Rs. 330 (£25); for 1935, 98,753 carats of rubies valued at Rs. 1,10,213 (£8,287), 202 carats of sapphires valued at Rs. 329 (£25) and 6,687 carats of spinels valued at Rs. 3,850 (£289). For 1936 the return was 155,381 carats of rubies valued at Rs. 97,103 (£7,301), and 172 carats of sapphires valued at Rs. 242 (£18), and in 1937, 157,308 carats of rubies, valued at Rs. 90,990 (£6,841) and 4,392 carats of sapphires, valued at Rs. 3,035 (£228).
In addition, the production was reported from Soomjam in the Padar district of Kashmir State in 1936, of 491,747 carats of sapphire, valued at Rs. 22,376 (£1,682), and, in 1937, of 18,344 carats of sapphire, valued at Rs. 550 (£41) (see also Corundum, p. 362). The sapphire deposits of Kashmir have long been known, but on account of their high altitude they are worked only occasionally. TABLE 51.-Quantity and value of Ruby and Sapphire produced in
India and Burma during the years 1936 and 1937.
The output of soda (phulli) in Kashmir State was 7 tons valued at Rs. 194 (£15) in 1934 ; the production in 1935 and 1937, was nil,
and 1 ton, valued at Rs. 33 (£2) in 1936, a Soda.
figure which was received too late for inclusion in last year's Review.
There was an increase in the production of steatite from 9,968 tons valued at Rs. 1,56,983 (£11,803) in 1936 to 13,040 tons, valued
at Rs. 1,55,221 (£11,671) in 1937, a slight fall Steatite.
in value. The increased production came principally from Jaipur State, Jubbulpore remaining stationary, and Hazaribagh falling, these being the principal sources.
TABLE 52.- Quantity and value of Steatite produced in India during
the years 1936 and 1937.
Until recently, figures of production of ammonium sulphate as a bye-product at the coking plants of iron and steel works and
collieries have been collected only every five Sulphate of ammonia.
years for the Quinquennial Reviews of Mineral Production. They prove, however, to be of such general interest that it has been thought desirable to report them annually, and the figures for 1936 and 1937 are shown in Table 53. Values have not been obtained, and ammonium sulphate does not therefore find a place in Table 1. The figures show an unimportant increase in production from 17,603 tons in 1936 to 18,150 tons in 1937. The exports for these two years were 3,232 and 1,919 tons respectively.
TABLE 53.- Production of Sulphate of Ammonia in India during the
years 1936 and 1937.
11.2 cwts. of tantalite valued at Rs. 301 (£23) were produced Tantalite.
in the Monghyr district of Bihar and Orissa during 1937.