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2. Diamond cutting - Wikipedia

   en.wikipedia.org/wiki/Diamond_cutting

   Cutting diamonds requires specialized knowledge, tools, equipment, and techniques because of its extreme difficulty. The first guild of diamond cutters and polishers (Diamantaire) was formed in 1375 in Nuremberg, Germany, [1] and led to the development of various types of "cut". This has two meanings in relation to diamonds.

3. Royal Asscher Diamond Company - Wikipedia

   en.wikipedia.org/wiki/Royal_Asscher_Diamond_Company

   The Asscher Diamond Factory former headquarters on the Tolstraat 127 in Amsterdam. The Royal Asscher Diamond Company (Dutch: Koninklijke Asscher Diamant Maatschappij) was founded in 1854 by the Asscher family of gemcutters. The company is responsible for cutting some of the most famous diamonds in the world including the 2nd largest diamond ...

4. Backes & Strauss - Wikipedia

   en.wikipedia.org/wiki/Backes_&_Strauss

   Founded in 1789, by German immigrant businessmen Georg Carl Backes and (later on) Max Strauss, the company is the oldest diamond company in the world. [1] By the early 19th century, Georg Carl Backes was a successful goldsmith in the city of Hanau, Germany. During this time, his company (originally named Backes & Co.) had done so well that he ...

5. List of tool manufacturers - Wikipedia

   en.wikipedia.org/wiki/List_of_tool_manufacturers

   Cutting, abrading, boring tools [10] Einhell: Landau an der Isar, Germany: Einhell: Power tools, garden equipment Elliott Tool Technologies: Dayton, Ohio, USA [11] Tubing Tools, Metal Finishing [12] Emerson: Ridgid, Proteam, Workshop [13] Various Fein: Stuttgart, Germany: Fein: Hand-held power tools and shop vacuum cleaners Flex ...

6. Diamond cut - Wikipedia

   en.wikipedia.org/wiki/Diamond_cut

   These diamond saws and good jewelry lathes enabled the development of modern diamond cutting and diamond cuts, chief among them the round brilliant cut. In 1919, Marcel Tolkowsky analyzed this cut: his calculations took both brilliance (the amount of white light reflected) and fire into consideration, creating a delicate balance between the two ...

7. Wittelsbach-Graff Diamond - Wikipedia

   en.wikipedia.org/wiki/Wittelsbach-Graff_Diamond

   The Wittelsbach-Graff Diamond is a 31.06-carat (6.212 g) deep-blue diamond with internally flawless clarity, originating in the Kollur Mine, India. Laurence Graff purchased the Wittelsbach Diamond in 2008 for £16.4 million. In 2010, Graff revealed he had had the diamond cut by three diamond cutters to remove flaws.