DIAMONDS.	9
	In Southern India, and possibly also in the Central Mahanadi-Godaveri tract, it is considered that the lower set of groups is alone represented, and the two have been correlated as follows :— On the southern rocks the local title of Karnul formation has been conferred.
	At Panna, in Bandelkhand, diamonds are only known certainly to occur in situ in a conglomerate which is referred to the Rewah group. There are, however, as elsewhere, numerous workings in alluvial or superficial deposits ; but the greatest amount of labour is spent in mining in this the bottom bed of the group, which, though it has a wide extension, has only as yet been ascertained to be diamond-bearing in the neighbourhood of Panna. Although diamonds have not been obtained directly from any lower group, it would appear that this conglomerate is largely made up of pebbles derived from the lowest or Semri sandstone group, and since it is stated* that * Mr. Medlicott, from whom I quote, states that this needs confirmation. The statement was made to him by a native miner.—Manual, p. 92.