JEFFRIES, DAVID. A TREATISE ON DIAMONDS AND PEARLS London: E. Lumley, after 1871. 116pp. Sinkankas states "The first book in English to describe how diamonds and pearls can be evaluated on the basis of the factors of size and style of cut....The "ideal" cut in Jeffries' time is a cushion brilliant, "old mine" cut....Being understandable in its explanations and providing accurate tables, this work immediately won acclaim." This is a later reprint of the fourth edition with a dedication to the Queen.
JEFFRIES, DAVID. A TREATISE ON DIAMONDS AND PEARLS London: E. Lumley, after 1871. 116pp. Sinkankas states "The first book in English to describe how diamonds and pearls can be evaluated on the basis of the factors of size and style of cut....The "ideal" cut in Jeffries' time is a cushion brilliant, "old mine" cut....Being understandable in its explanations and providing accurate tables, this work immediately won acclaim." This is a later reprint of the fourth edition with a dedication to the Queen.
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