Adela E. Orpen, Stories About Famous Precious Stones
“ But after the touch of the magic wheel there is no substance which can compare with the diamond for luster, brilliancy and iridescence.Certain Indian diamonds finished by the hand of Nature and known as "Naifes," are an exception to the rule that rough diamonds are dull looking. They are seldom or never found now, but were greatly prized by the natives in olden times and considered superior to the artificially polished stone. They were octahedral in form, with polished facets. The primary crystalline form of the diamond is the octahedron, or a figure of eight sides ”
