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  2. Cut (gems) - Wikipedia

    en.wikipedia.org/wiki/Cut_(gems)

    The diamond cut planning stage is a complex process that requires the cutter to work with unique rough stones. Very often, the location of the inclusions in a rough stone will determine the type of shape to which a diamond may be cut. For economic reasons, most diamonds are cut to retain weight instead of maximizing brilliance. [2]

  3. Diamond cutting - Wikipedia

    en.wikipedia.org/wiki/Diamond_cutting

    The first major development in diamond cutting came with the "Point Cut" during the later half of the 14th century: the Point Cut follows the natural shape of an octahedral rough diamond crystal, [2] eliminating some waste in the cutting process. Diamond cutting, as well as overall processing, is concentrated in a few cities around the world.

  4. FASTON terminal - Wikipedia

    en.wikipedia.org/wiki/FASTON_terminal

    The name "tab" terminals is a description of the shape of the male terminal. Six series are covered in one of TE 's catalogs (which omits the 0.375 in/9.5 mm, but mentions it elsewhere), named after their blade width in mils . [ 3 ]

  5. Diamond blade - Wikipedia

    en.wikipedia.org/wiki/Diamond_blade

    Normally, tens or hundreds of diamond gang saw blades are used together to saw raw stone blocks. A diamond band saw blade is a flexible closed steel band with diamonds fixed (often by electroplating) on one edge of the band. Diamond blades designed for specific uses include marble, granite, concrete, asphalt, masonry, and gem-cutting blades.

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  7. 66 block - Wikipedia

    en.wikipedia.org/wiki/66_block

    A split-50 M-type 66 block with bridging clips attached. A 66 block is a type of punch-down block used to connect sets of wires in a telephone system. They have been manufactured in four common configurations, A, B, E and M. [a] A and B styles have the clip rows on 0.25" centers while E and M have the clip rows on 0.20" centers. The A blocks ...

  8. Punch-down block - Wikipedia

    en.wikipedia.org/wiki/Punch-down_block

    A punch-down block (also punchdown block, punch block, punchblock, quick-connect block and other variations) is a type of electrical connection often used in telephony. It is named because the solid copper wires are "punched down" into short open-ended slots which are a type of insulation-displacement connector .

  9. Lapidary - Wikipedia

    en.wikipedia.org/wiki/Lapidary

    In Australia, there are numerous gem shows, including an annual gem show called the GEMBOREE, which is a nationwide lapidary competition. There is a collection of gem and mineral shows held in Tucson, Arizona, at the beginning of February each year. The event began with the Tucson Gem and Mineral Society Show and has now grown to include dozens ...

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