facets

1 Small, flat surfaces ground onto cut gemstones. Some cuts enhance colour at the expense of brilliance. See jewel cutting. 2 Angular, light-reflecting surfaces in BRIGHT-CUT ENGRAVING.

Facets

The visual units that compose the compound eye.

Facets

A facet is a flat small surface found on a cut gemstone. Faceting a stone can raise its value considerably as this process enhances some of the most appreciated attributes, such as transparency and clarity, allowing light to refract in the most appealing way possible.
Found on http://www.studiojewellery.com.au/jewellery-glossary-f.html
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