Arkansas stone

arkansas stone - a grayish-white stone used primarily for preparing gravers and pivots for polishing.
assaying - Testing alloys, bullion and ores to determine the proportions of precious metal content.
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ARKANSAS STONE
Arkansas stone is an abrasive used in jewelry making. It is used to smooth metals.
ART DECO ...

Arkansas Stone: An abrasive used to smooth metals in jewelry making.

Arkansas Stone: Used to smooth metal in the jewelry making process.
Art Deco: A style that originated in Paris, France in the 1910s that incorporated geometric shapes bold colors and angles. The name derives from the 1925 Paris Exposition.

See also: Carbon, Facet, Translucent, Cameo, Transparent