DDG Ass #14 Key Terms and Concepts PDF

DDG Ass #14 Key Terms and Concepts Belly—The slightly curving center of the long side of a pear, marquise, heart, or oval. Bow-Tie—A dark area across the center of an elongated brilliant cut. Brilliant Cut—A cutting style in which triangular and kite-shaped facets radiate from a gem’s cent...

DDG Ass #14 Key Terms and Concepts Belly—The slightly curving center of the long side of a pear, marquise, heart, or oval. Bow-Tie—A dark area across the center of an elongated brilliant cut. Brilliant Cut—A cutting style in which triangular and kite-shaped facets radiate from a gem’s center toward its girdle. Cutting Style—The arrangement of a gem’s facets. Fancy Cuts—Any gemstone cut other than a standard round brilliant. French Tips—A faceting style that replaces the large bezel facets at the points of marquises, pears, and hearts with star and upper half facets. Length-to-Width Ratio—A numerical expression of the relationship between the length and width of a fancy cut, where the value for width is one. Mixed Cut—A cutting style that combines step-cut and brilliant-cut facets. Pavilion Bulge—Outward curve of the pavilion facets of a step-cut diamond. Shape—The face-up outline of a gem. Shape Appeal—A diamond’s overall attractiveness in relation to others of the same shape and cutting style. Step Cut—A cutting style with long, narrow, four-sided facets in rows parallel to the girdle on both the crown and pavilion. Key Concepts: Shape is often the major selling point of a fancy-cut diamond. Because fancy cuts are different from one another, each one has its own set of variables. The factors that make a fancy cut appealing are often as much emotional as they are practical. To color grade fancy cuts, graders look at them face-down and diagonally, and also consider face-up color. The bow-tie’s darkness and size determine its effect on a diamond’s appearance. Excess pavilion bulge increases unplanned light leakage and adds weight. The grading report is a useful guide to a particular fancy cut’s identifying characteristics. Fancy cuts attract buyers looking for something unique.