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Diamantiferous, dī-a-man-tif′er-us, adj. yielding diamonds.

It was soon found that each mine was in reality a huge vertical funnel or crater descending to an unknown depth, and filled with diamantiferous blue ground.

At first each claim was an independent pit 31 ft. square sunk into the blue ground; the diamantiferous rock was hoisted by bucket and windlass, and roadways were left across the pit to provide access to the claims.

Comparatively few of the pipes which have been discovered are at all rich in diamonds, and many are quite barren; some are filled with “hard blue” which even if diamantiferous may be too expensive to work.

The sandstones and conglomerates belong to the Vindhyan formation and overlie the old crystalline rocks: the diamantiferous beds are well defined, often not more than 1 ft. in thickness, and contain pebbles of quartzite, jasper, sandstone, slate, &c.