|Marine Diamond Corporation Marmo ra diamond marquise cut|
|Written by Administrator|
|Friday, 21 September 2007|
Marine diamond Corporation (Pty.), Ltd. A company that was organized in 1961 to exploit off-shore diamond deposits along the coast of Southwest Africa. The concession area extends north from the Orange River to the town of Luderitz. See south-west
marine terrace. See terrace
mark. A term used by a few jewelers in selling as a substitute for the more conventional clarity grading terminology; for example, slightly marked or very slightly marked in place of slightly imperfect or very slightly imperfect.
markings (on diamond). See growth markings.
Marmarosch diamond. A misnomer for rock crystal.
Marmora diamond. A misnomer for rock crystal.
marquise cut (mar-keez"). A style of diamond cutting in which the girdle outline is boat shaped. The shape
and placement of the facets is of the brilliant type.
Marsden, R. S. A British scientist who, in 1880, claimed to have produced synthetic Diamonds from a solution of amorphous carbon and molten silver. There is no proof that his experiments were successful. See synthetic diamond.
Martapura. A city in Kalimantan (formerly Borneo), in the vicinity of which are located some of the island's principal diamond deposits.
Martian Pink diamond. A flawless 12.03-carat pink round brilliant diamond, purchased by Harry Winston, New York City gem merchant, in 1975. It was exhibited in June of 1976 at the opening of the new Gem and Mineral Hall at the American Museum of Natural History. In July 1976 the diamond was christened the "Martian Pink" in honor of the American achievement of landing a scientific probe on the surface of the planet Mars. It was shortly thereafter sold to an unknown client in the United States.
Marvelite. Trade name for man-made strontium titanate.
Mascarenhas I and II Diamonds.
Seen by Tavernier in Goa in 1648. Belonged to Portuguese Viceroy, Dom Philip Mascarenhas. 57 and 67.50 carats, good quality, Indian cut. Additional information lacking.
mass. A term sometimes used for a rough diamond during the early phases of the fashioning operation.
massa. A Brazilian term for diamond deposits lying high on the hills and plateaus above present watercourses.
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