Maiden Lane Major Bowes Diamond Mallin Diamond Mines
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Friday, 21 September 2007

Maiden Lane. The New York City street that was once the center of the diamond and jewelry industry in America. Although it is still impor­tant, 47th Street has replaced Maiden Lane in importance.

main facets. An all-inclusive term that refers to the large crown and pavilion facets of a brilliant-cut dia­mond or other gem. See bezel facets,

PAVILION FACETS.

Majorana, Q. An investigator into the problem of diamond synthesis who, in 1897, claimed to have made Diamonds by using an electric cur­rent to heat carbon in a steel con­tainer at the same time that it was compressed by an explosion of gun­powder. There is no proof that his experiments were successful. See

SYNTHETIC diamond.


Major Bowes diamond. Once owned by the famed originator of the radio amateur hour, the Major Bowes is a 44.50-carat yellow diamond. He willed it to Cardinal Francis Joseph Spellman of New York, Rpman Cath­olic clergyman and author. Subse­quent owners were C. C. Kaufman of New York City and Erwin Wol-lands of Cleveland, Ohio. In 1958, while in the possession of Jack M. Werst, Miami, Florida, gem dealer, the gem was stolen in an armed rob­bery and has never been recovered.

make. A trade term that refers to the proportions and finish of a fashioned diamond; for example, good make refers to a stone that is well pro­portioned, symmetrical and well polished. Also said to be well made.

See TOLKOWSKY THEORETICAL BRILLIANT CUT; CUTTING; PROPORTIONS; PROPORTIONS, GOOD; SYMMETRY; FINISH; POORLY MADE; WELL MADE.

makeables. Trade term used by dia­mond designers for whole stones (diamond crystals) which are ground without preliminary work. Includes macles, cleavages, chips, etc.

Mali Federation. A new country made up of the former French ter­ritories of Senegal and French Sudan (now the Sudanese Republic). A number of kimberlite pipes were dis­covered by prospecting parties of the mining directorate before indepen­dence was achieved. They are lo­cated in West Sudan, in the cliffs of Tambouara, in the Faleme River ba­sin. Several large Diamonds have been found. See French west africa.

Mallin diamond Mines, Ltd. The

mining company that works a small dike, or fissure, in the Transvaal, at Zwartruggens, Republic of South Af-


rica. The fissure extends for more than 9000 feet, but has a width of only one to three feet. Annual recov­ery is on the order of 100,000 carats from a relatively small tonnage of blue ground processed. Yield is usu­ally over 140 carats per 100 loads, mostly of industrial quality. Mallin diamond Mines, Ltd., is a wholly owned subsidiary of Carrig Dia­monds, Ltd.