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Bicker-Carteen Diamond PDF Print E-mail
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Thursday, 13 September 2007
Bicker-Carteen diamond. A 56-carat fine white diamond reported by "The Diamond News" in 1958 to have been bought in Paris by one of the Aga Kahn's sons. Present where¬abouts unknown.
 
bezel PDF Print E-mail
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Thursday, 13 September 2007
bezel (bez"-el). (1) That portion of a brilliant-cut gemstone above the gir¬dle; same as crown. (2) More speci¬fically, the sloping surface between the table and the girdle. (3) Still more specifically, only a small part of that sloping surface just above the girdle; the so-called setting edge. (4) The groove made in a setting to receive the girdle and the immediately adja¬cent section of a gemstone. bezel-angle gauge. See diamond-ANCLE GAUGE. bezel-main facets. Same as top-main or bezel facets. See BEZEL FACETS. bezel (or top-main) facets. The eight large, four-sided facets on the crown of a round, brilliant-cut gem, the upper points of which join the table and the lower points, the girdle. Some diamond cutters further distin¬guish four of these as quoin or top-corner facets. See BRILLIANT CUT (ROUND). bezil. Same as bezel.
 
bewijs PDF Print E-mail
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Thursday, 13 September 2007
bewijs. A Dutch term used by diamond cutters to mean a natural that forms an indentation on a finished stone. See NATURAL, RAW.
 
bevel cut PDF Print E-mail
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Thursday, 13 September 2007
bevel cut. A variation of the step cut that produces a large table, joined to the girdle by one or sometimes two bevels. The bottom may be faceted or it may be the same as the top, in Bevel cut which case it .is called a double bevel cut. The bevel cut is some¬times used for covering miniatures or other small portraits in rings, brooches, etc., when it is known as a portrait stone or a lasque (apparently an East Indian word for portrait stone).
 
best cleavage PDF Print E-mail
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Thursday, 13 September 2007
best cleavage. A grading term used at the mines for a diamond block, or cleavage, of good quality, color and shape.
 
Berglen Diamond PDF Print E-mail
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Thursday, 13 September 2007
Berglen diamond. One of the largest alluvial Diamonds ever found (1924) in the Republic of South africa's Transvaal Province. 416.25 carats. Whereabouts unknown. Berquen, Robert de. See BERCHEM, LODEWYK VAN.
 
Berghem PDF Print E-mail
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Thursday, 13 September 2007
Berghem, Lodewyk Van (alternate spellings are Berghem, Ludwig Van; Berquem, Louis de; Berquen, L. von). Fifteenth century gem dealer who was credited with the invention of diamond finishing by diamond powder until it was established that its invention preceded 1476, the year in which he was believed to have first used the process. Later, he was credited with the invention of the polishing wheel. The belief, how¬ever, that Lodewyk was responsible for finishing Diamonds with powder was furthered in a 17th century treatise written by Paris jeweler, Robert de Berquen, who claimed to be a descendant of the inventor. The inaccuracy created by the treatise can be understood better in view of the amount of progress achieved in diamond processing in the 15th and 16th centuries.
 
Benedito Valladares Diamonds PDF Print E-mail
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Thursday, 13 September 2007
Benedito Valladares Diamonds I, II, and III. A 108.25-carat rough discov¬ered in 1940 in the Corrego Coro River, Estrella do Sul, Minas Cerais, Brazil. It was purchased by Birn-baum Brothers, New York, who fash¬ioned it into three emerald cuts de- noted as I, II, and III weighing 30, 20, and 8 carats, respectively. Other weights in the literature list I as 39 carats and III as 6 carats. Ultimate disposition of the stones is unknown.
 
belly PDF Print E-mail
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Thursday, 13 September 2007
belly. The central area of a marquise, oval, or pear shape diamond, when viewed from above. See MARQUISE, OVAL, PEAR SHAPE.
 
Belgische Diamant Nijverheid PDF Print E-mail
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Thursday, 13 September 2007
Belgische Diamant Nijverheid. The official organization of diamond manufacturers of Belgium. Belgravia Mine. A minor diamond pipe mine in the Kimberley area, Re¬public of South africa.
 
bedrock PDF Print E-mail
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Thursday, 13 September 2007
bedrock. A general term for the solid rock that underlies unconsolidated surface materials such as soil or al¬luvium composed of clays, silts, sands and gravel.
 
Beaumont Diamond PDF Print E-mail
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Thursday, 13 September 2007
Beaumont diamond. Found in the Windsorten area, Republic of South africa; date unknown. 273 carats. Sold to Mr. Bernard Oppenheimer, eldest brother of Sir Ernest, for £4000. Sir Ernest (1880-1957) was Chairman of De Beers Consolidated Mines, Ltd. Whereabouts unknown.
 
bearded girdle PDF Print E-mail
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Thursday, 13 September 2007
bearded girdle. If a diamond is rounded up too quickly in the fash¬ioning process, the surface of the girdle will lack the smoothness and waxy luster of a finely turned girdle. Consequently, numerous minute, hairline fractures extend a short dis¬tance into the stone. A girdle with this appearance is referred to as being bearded. See GIRDLE.
 
Bazu Diamond PDF Print E-mail
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Thursday, 13 September 2007
Bazu diamond. The French jeweler and traveler, Tavernier, obtained this stone in India's Kollur Mines in the seventeenth century. It was sold to a Dutch merchant, who had it cleaved into a number of smaller stones.
 
Baumgold Brilliant Diamond PDF Print E-mail
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Thursday, 13 September 2007
Baumgold Brilliant diamond. The Baumgold Brilliant was formerly a round, colorless brilliant of 55 carats, measuring almost one inch in diame¬ter. It was originally cut from a South African rough weighing 167.25 carats. Later, it was recut to a well-made 52-carat stone with a polished girdle before being sold to an undis¬closed buyer. Baumgold Pear Diamonds. Two pear-shaped stones weighing 50 carats each were cut from the Baum¬gold Rough which yielded a total of 14 stones. Present owner and loca¬tion unknown. Baumgold Rough Diamond. This 609.25-carat bluish-colored rough was found at the Wesselton Mine, Republic of South africa in 1922. It was acquired in 1923 by Baumgold Brothers, Inc., New York, and 14 stones were cut from it. The largest stones cut were two pear-shapes, the famous Baumgold Pears weighing 50 carats each. There is no record of the size of the other stones but most of the 14 reportedly were sold in San Francisco.
Last Updated ( Thursday, 13 September 2007 )
 
Battershill Diamond PDF Print E-mail
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Thursday, 13 September 2007
Battershill diamond. Discovered at Williamson Diamond Mine, Mwa-dui, Tanzania, in 1945. Named for the Governor of that country, Sir William Battershill; 65 carats. Present lo¬cation not known.
 
batea PDF Print E-mail
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Thursday, 13 September 2007
batea (bah-tay"-ah). A Brazilian term for a wide, shallow pan that was used by early diamond and gold prospectors for washing gravel. baton. A term used by the British for our baguette cut.
 
Basurehi Mine PDF Print E-mail
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Thursday, 13 September 2007
Basurehi Mine. One of the more im¬portant alluvial diamond mines in India. See INDIA. Basutoland. Now called Lesotho. See LESOTHO.
 
Baroda gem PDF Print E-mail
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Thursday, 13 September 2007
Baroda gem. A trademark name for a glass foilback that simulates the ap¬pearance of diamond. See FOILBACK.
 
Barnato Brothers PDF Print E-mail
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Thursday, 13 September 2007
Barnato Brothers. Barney and Harry Barnato, whose real surname was Isaacs, were some of the early de¬velopers of the South African diamond fields. They progressed from a variety act, to kopje wallop¬ers, to claim holders, and finally diamond industry moguls. By 1880, they formed the Barnato Mining Company and merged with the Kim¬berley Central Mining Company, which was the first group to sink shafts into the center of the Big Pipe at Kimberley. Barnato Mining Company Ltd. Founded by the brothers, Barnett Isaacs and Harry Isaacs, in 1873 on the basis of three claims in the Kim¬berley pipe. They started large spot transactions in their own shares and within a very short time made a for¬tune. Soon, the younger brother, Barnett (Isaacs) Barnato merged the Barnato Diamond Mine Company Ltd., with the Kimberley Central Company and amalgamated with other companies so that only the Compagnie Francaise, and the Kim¬berley Central Company, controlled by Barnato, were left to battle over the Kimberley pipe. In 1887, the Compagnie Francaise merged with Cecil Rhodes' De Beers Mining Company Ltd., after which a titanic struggle for the Kimberley pipe en¬sued between Rhodes and Barnato. By 1888, Cecil Rhodes became majority stockholder of the Kimber¬ley Central and on July 18, 1889, Rhodes liquidated the Kimberley Central and his De Beers Consoli¬dated Mines Limited finally gained control of the Kimberley pipe. See BARNATO BROTHERS.
Last Updated ( Thursday, 13 September 2007 )
 
Barnato, Barnett PDF Print E-mail
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Thursday, 13 September 2007
Barnato, Barnett (1852-1897). An English speculator who came to Kimberley, Republic of South africa, in 1873. He bought his first diamond claim in 1876, and in 1881 floated his first company. His ambition to unite all companies in Kimberley under a single organization led first to rivalry, and finally to amalgama¬tion (in 1888), with Cecil Rhodes, who had succeeded in consolidating the De Beers mining companies and who bested Barnato in the fight for control of Kimberley. See RHODES, CECIL JOHN.
 
Barkly West PDF Print E-mail
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Thursday, 13 September 2007
Barkly West. A town on the Vaal River, Cape Province, Republic of South africa, and the location of numerous alluvial diamond diggings. It was the site of the discovery of such large stones as the 109.25-carat Barkly Breakwater Diamond and the 412.50-carat Broderick Diamond. It was originally called Klip-Drift, but was renamed after Sir Henry Barkly (1815-1898), who was Governor of the Cape of Good Hope in 1870. See KLIP-DRIFT.
 
Barkly Breakwater Diamond PDF Print E-mail
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Thursday, 13 September 2007
Barkly Breakwater diamond. Found in 1905 at Barkly West, Republic of South africa, during the construction of a breakwater. 109.25 carats. Whereabouts unknown.
 
Barion cut PDF Print E-mail
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Thursday, 13 September 2007
Barion cut. A mixed cut comprised of 62 facets designed and developed by Jooste's diamond Cutting Works (Pty.) Ltd., Johannesburg, Republic of South africa. It is a combination of two cuts, the crown being a full emerald cut and the pavilion a mod¬ified brilliant cut.
 
Bantam Diamond PDF Print E-mail
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Thursday, 13 September 2007
Bantam diamond. A diamond of un¬known weight described by Taver-nier as a prominent stone in the hilt of the dagger belonging to the Rajah of Bantam. The Rajah showed it to the famous French jeweler and traveler, Tavernier, when he visited Java in 1648. No additional data is available; however, it may be the Holland Diamond described in the 19th century. See HOLLAND DIAMOND.
 
bantam PDF Print E-mail
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Thursday, 13 September 2007
bantam. A term used by South Afri¬can miners for any one of several minerals that indicate the presence of Diamonds in the river diggings.
 
Banian Diamond PDF Print E-mail
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Thursday, 13 September 2007
Banian diamond. Bought by Taver-nier, the French jeweler and traveler, in India in the seventeenth century. 48.50 carats. Thought to have been sold to a Dutch sea captain. Addi¬tional information unavailable.
 
Bandjermasin PDF Print E-mail
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Thursday, 13 September 2007
Bandjermasin. A city in Kalimantan (Borneo), Republic of Indonesia, in the vicinity of which are located
 
bandeirantes PDF Print E-mail
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Thursday, 13 September 2007
bandeirantes. The Brazilian name for the early explorers who came to Brazil in search of gold and made the first discovery of Diamonds near Diamantina, in the northeastern part of the State of Minas Gerais.
 
ballerina setting PDF Print E-mail
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Thursday, 13 September 2007
ballerina setting. A type of setting popular for more important gem-stones in which a central stone is sur¬rounded by baguette Diamonds mounted close together and side by side and radiating out in an undulat¬ing ballerina skirt-like effect. (See illustration.)
 
ballas PDF Print E-mail
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Thursday, 13 September 2007
ballas. Spherical masses of minute, intergrown diamond crystals, ar¬ranged more or less concentrically. A very hard and tough industrial vari¬ety of diamond.
 
Ball, Dr. Sydney Hobart PDF Print E-mail
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Thursday, 13 September 2007
Ball, Dr. Sydney Hobart (1878-1949). A noted American geologist and mining engineer. Dr. Ball was consulting engineer for the Societe Internationale Forestiere et Miniere du Congo and leader of the expedition that found the first diamond in the Republic of Zaire (formerly Belgian Congo) for which he was decorated three times by the government of that country. Other important posts held included chief geologist for the Companhia de Diamantes de Angola and member of the Advisory Board of the Gemological Institute of America. He was the author of the Annual Review of the Diamond In¬dustry, the gemstone chapter of the U.S. Bureau of Mines' Mineral Year¬book, and wrote numerous treatises and papers on geology and mineral¬ogy. His last publication was A Roman Book on Precious Stones, published in 1950 by the Gemoiogi-cal Institute of America.
 
Bakerville PDF Print E-mail
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Thursday, 13 September 2007
Bakerville. A minor alluvial diamond deposit in the Lichtenburg area, Transvaal, Republic of South africa. Bakwanga. See LUBILASH, REPUBLIC OF ZAIRE.
 
Bahias PDF Print E-mail
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Thursday, 13 September 2007
Bahias. A little-used trade term that refers to Diamonds of inferior color grade. The name is derived from the character of the majority of the stones from the Bahia deposits in Brazil. See BAHIA.
 
Bahiahini PDF Print E-mail
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Thursday, 13 September 2007
Bahiahini. One of the companies in Accra, Ghana, that is licensed by the government of that country to buy Diamonds from native miners. See GHANA.
 
Bahia PDF Print E-mail
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Thursday, 13 September 2007
Bahia (bah-e"-ah). A gem-producing state in Brazil. Diamonds were dis¬covered here as early as 1755. The most important diamond-bearing re¬gion is in the vicinity of Cincora. The stones are inferior to those from Bagagem and Canavieiras. Bahia is also an important source of car¬bonado. See BRAZIL.
 
baguette PDF Print E-mail
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Thursday, 13 September 2007
baguette (bah-get"). A French word meaning rod. A style of step cutting for small, rectangularly-shaped gem-stones, principally Diamonds.
 
bagos de arroz PDF Print E-mail
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Thursday, 13 September 2007
bagos de arroz. Spanish for bags of rice. A Brazilian term for long, flat, rough Diamonds.
 
Bagagem PDF Print E-mail
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Thursday, 13 September 2007
Bagagem. The source of some of the finest Brazilian Diamonds. The sec¬ond diamond-bearing region to be discovered in Brazil, west of Dia-mantina in Minas Cerais. It was in this area that the famous Star of the South was found.
 
Bad Hope PDF Print E-mail
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Thursday, 13 September 2007
Bad Hope. A minor alluvial diamond deposit in the Barkly West area, Cape Province, Republic of South Af¬rica. This mine contributes very little to total South African alluvial pro¬duction.
 
Baden Solitaire Diamond PDF Print E-mail
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Thursday, 13 September 2007
Baden Solitaire Diamond. In 1918, the Austrian Royal family took many of the Crown Jewels to Switzerland when they went into exile; among them was a 30-carat diamond called the Baden Solitaire. It was mount¬ed in the clasp of the 114-pearl necklace, part of a set of diamond-and-pearl jewelry that belonged to the Hapsburgs. Later it was thought to have been stolen by a person close to the Family and taken to South America with other gems from this historic collection. There is no record of this stone's whereabouts today.
 
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