...Pennsylvania, described ' the occurrence of the 2 crystalline varieties of carbon in that State,—the graphite in beds interstratified with schist or gneiss;...diamonds have thus been found. They occur distributed G HISTORY OF THE GEMS FOUND IN NORTH CAROLINA. over a wide area of surface in the counties of Burke,...

...yet no diamonds have actually been discovered there, and but few have been found in the loose debris of the crystalline beds. The late Prof. Frederick...diamonds have thus been found. They occur distributed ' Gems and Gem Mining In the South, by Joseph Hyde Pratt ; The Southland, Vol. I, No. 2, p. 4, 1901....

...crystalline beds. The late Prof. Frederick A. Genth, of the University of Pennsylvania, described 1 the occurrence of the 2 crystalline varieties of carbon...diamonds have thus been found. They occur distributed 'Gems and Gem Mining In the South, by Joseph Hyde Pratt; The Southland, Vol. I, No. 2, p. 4, 1901....

...quartzose micaslate of similar age with the North Carolina gneissoid rocks, or that, if it is cotemporary with the North Carolina itacolumite, the diamonds were not produced in the same but came from older rocks, and were re-deposited with the sands resulting from their reduction to powder and are...