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Welcome to our extensive antique jewelry glossary with around 1,500 jewelry related entries.If you feel you are missing an explanation, feel free to let us know and we will add it.
A facet on the side of a native-cut, partly-coloured gemstone (usually a sapphire) that is cut so that the strongest colour is at the base and the stone consequently appears to have a uniform colour when viewed through the table but appears clear when viewed from the side. A facet cut on a diamond with a rough or coated surface to permit a visual examination of the interior. The process is called 'opening the diamond'. A facet on some square-cut emeralds or other so cut gemstone that permits light to escape and through which an object can be seen when viewed from the table.
From: An Illustrated Dictionary of Jewelry, autor: Harold Newman, publishers: Thames and Hudson