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  2. Faceting machine - Wikipedia

    en.wikipedia.org/wiki/Faceting_machine

    A faceting machine is broadly defined as any device that allows the user to place and polish facets onto a mineral specimen. Machines can range in sophistication from primitive jamb-peg machines to highly refined, and highly expensive, commercially available machines.

  3. Diamond cutting - Wikipedia

    en.wikipedia.org/wiki/Diamond_cutting

    The weight retention analysis studies the diamond rough to find the best combination of finished stones as it relates to per carat value. For instance, a 2.20-carat (440 mg) octahedron may produce (i) either two half-carat (100 mg) diamonds whose combined value may be higher than that of (ii) a 0.80-carat (160 mg) diamond plus a 0.30-carat (60 ...

  4. Lapidary - Wikipedia

    en.wikipedia.org/wiki/Lapidary

    There are three broad categories of lapidary arts: tumbling, cabochon cutting, and faceting. Among a modern gemcutter's work are the following activities: Positioning rough stone in a holder, and holding the stone against the edge of a revolving saw or lapidary slitter impregnated with diamond dust to cut and slit stone.

  5. Diamond cut - Wikipedia

    en.wikipedia.org/wiki/Diamond_cut

    The crown height is related to the crown angle, the crown facet size, and the table size (the largest central facet of the crown): a happy medium is sought in a table that is not too small (resulting in larger crown facets and greater fire at the expense of brilliance) or too large (resulting in smaller crown facets and little to no fire).

  6. Mortgage and refinance rates for Dec. 23, 2024: Holiday week ...

    www.aol.com/finance/mortgage-and-refinance-rates...

    The holiday week opens with another rise in average rates on 30-year and 15-year fixed-term mortgages, trending higher after the Federal Reserve announced a third straight cut to its benchmark ...

  7. It's the end of the road for these cars: Models that won't ...

    www.aol.com/end-road-cars-models-wont-131806139.html

    A number of car models won't ring in the new year.. The Ford Edge, Toyota Venza and Mini Clubman are just some of the vehicles that won't make it past model year 2024 in U.S. markets.

  8. Cheap, pre-owned EVs are about to flood the market. Is that a ...

    www.aol.com/finance/cheap-pre-owned-evs-flood...

    Buy new — or used? Winner of the 2024 World Car of the Year award, the Kia EV9, at the New York International Auto Show at the Jacob Javits Convention Center in New York City last March.

  9. Stonesetting - Wikipedia

    en.wikipedia.org/wiki/Stonesetting

    There are two general types of gemstone cutting: cabochon and facet. Cabochons are smooth, often domed, with flat backs. [ 1 ] Agates and turquoise are usually cut this way, but precious stones such as rubies , emeralds and sapphires may also be.

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