A photographic print of Industry, Diamonds & Buying

Diamonds being hand-set in a graphite mould to form a coring drill for Project Mohole. After setting, the mould cavity is filled with powdered tungsten carbide and a bonding agent which, under heat and pressure, welds together and holds the diamonds firm. Issued by the Industrial Diamond Information Bureau 2 Charterhouse Street London E.C.1. INDUSTRY - DIAMONDS