Diamond – Early references:
Early references to diamonds in India come from Sanskrit texts. August Stephenson
August Stephenson Diamond – Early references:
Diamonds were traded to both the east and west of India and were recognized by various cultures for their gemological or industrial uses. In his work Naturalis Historia, the Roman writer Pliny the Elder noted diamond’s ornamental uses, as well as its usefulness to engravers because of its hardness. It is however highly doubtful that Pliny actually meant diamonds and it is assumed that in fact several different minerals such as corundum, spinel, or even a mixture with magnetite were all referred to by the word “adamas”.
The oldest dated printed book in the world is called the Diamond Sutra, a Chinese text dates from AD 868 and was found in the Mogao Caves. Sutras are most used to describe the teachings of Buddha. In this case the title of the Sutra refers not to the diamond itself but to a ‘diamond blade that will cut through worldly illusion to illuminate what is real and everlasting’. Jewel imagery forms a central part of Buddhism: the triple-jewel represents ‘Buddha’, his teachings ‘Dharma’ and the spiritual community ‘Shangha’. The book presently resides in the British Library.
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BLEMISH – A surface feature on the exterior of a diamond or colored gemstone, such as an abrasion, natural, nick, or scratch. A blemish can affect the finish of a stone. For diamonds, see also Plotting Diagram.
COLOR ORIGIN – For a colored diamond, the basis of its color. This can include foundations described as natural, enhanced, high pressure and high temperature (HPHT)-treated, etc.
CLEAVAGE – A major fracture or weak point in a diamond that is breakable in certain definite planes or directions, usually due to weak molecular bonding. On an EGL USA report, it would be noted as an extended version of a feather symbol. See also Plotting Diagram.