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Cutting and polishing diamonds in the Netherlands, 1946. The art of cutting a gem is an exacting procedure performed on a faceting machine.The ideal product of facet cutting is a gemstone that displays a pleasing balance of internal reflections of light known as brilliance, strong and colorful dispersion which is commonly referred to as "fire", and brightly colored flashes of reflected light ...
Delta Faucet Company is a division owned by Masco, which was founded in Detroit in 1929 by Armenian immigrant Alex Manoogian.In 1952, an eager inventor brought Manoogian his latest invention, a one-handled faucet that mixed both hot and cold water with a ball-valve.
Gold ring with Old European cut diamonds, late 1800s, Hallwyl Museum. The earliest diamond cutting techniques were simply to polish the natural shape of rough diamonds, often octahedral crystals. [1] Around the 1500s, polishing and cutting inventions made it possible to shape diamonds better, cut facets and make the stones sparkle more. [2]
The girdle may be frosted, polished smooth, or faceted. In recent decades, most girdles are faceted; many have 32, 64, 80, or 96 facets; these facets are excluded from the total facet count. Likewise, some diamonds may have small extra facets on the crown or pavilion that were created to remove surface imperfections during the diamond cutting ...
The Golden Jubilee Diamond, a 545.67 carat (109.13 g) brown diamond, is the largest cut and faceted diamond in the world. It outweighs the Cullinan I by 15.37 carats (3.07 g). The Golden Jubilee Diamond was discovered in 1985 at the Premier Mine , which is also the origin of the Cullinan diamond (1905) and other notables such as the Taylor ...
Gold(III) oxide (Au 2 O 3) is an inorganic compound of gold and oxygen with the formula Au 2 O 3.It is a red-brown solid that decomposes at 298 °C. [3]According to X-ray crystallography, Au 2 O 3 features square planar gold centers with both 2- and 3-coordinated oxides.
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