CS Book 2 _AS- 8 KT.pdf

Color Key Terms Bodycolor—A gemstone’s basic color, determined by its Saturation—A color’s strength or intensity. selective absorption of light. Color range—The selection of...

Color Key Terms Bodycolor—A gemstone’s basic color, determined by its Saturation—A color’s strength or intensity. selective absorption of light. Color range—The selection of colors in which a gemstone Tone—Degree of darkness or lightness of a color. occurs. Color zoning—Areas of different color in a gem, caused by Trade terms—Terms often used in the jewelry industry to variations in growth conditions. describe particular gemstone colors or link gems with specific geographic locations. Extinction—Dark areas in a faceted transparent colored stone. Unintended color zoning—Visible face-up color zoning Fine color—The color or colors in a gemstone’s color range that the cutter was unable to conceal. considered by the trade to be the most desirable. Hue—The first impression of an object’s basic color. Unplanned light leakage—Light that exits through the pavilion in an uncontrolled way due to compromises in a Intended color zoning—Visible face-up color zoning that gem’s proportions. was planned during the cutting process. Planned light leakage—Light that exits through a gem’s Window—An area of weak saturation in a transparent crown in a controlled way due to the correct proportions gemstone’s bodycolor that usually results from the way of its cut. the gem was cut. 107