Term
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Definition
| light that eventually returns to the |
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Term
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Definition
| cutting style with triangular or kite-shaped facets that radiate from the center toward the girdle |
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Definition
| a smoothly rounded polished gem with a domed top and a flat or curved base |
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Definition
| a gem carving style in which the design, often with a woman's profile, projects slightly from a flat or curved surface |
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Definition
| removing heavily included sections from gemstone rough by carefully tapping it with a small hammer |
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Definition
| top part of the gem above the girdle |
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Term
| Crown-height to Pavilion-depth Ratio |
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Definition
| the relationship of the height of a gem's crown to the depth of its pavilion, judged by viewing its profile |
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Definition
| artistic gem cuts that aren't limited to specific proportions or shapes |
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Term
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Definition
| wooden or metal stick that holds the preform during faceting |
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Term
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Definition
| device that holds the dopstick at precise angles to allow correct orientation during faceting and polishing |
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Term
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Definition
| a free-form cut that can feature alternating curved and flat surfaces |
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Definition
| narrow section that forms the boundary between the crown and the pavilion, and functions as the gem's setting edge |
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Term
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Definition
| giving approximate shape to a gemstones, or producing flat planes for polishing facets |
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Term
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Definition
| a design engraved into the surface of a gemstone |
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Term
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Definition
| horizontal spinning metal disk used to grind or polish a gem's facets |
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Term
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Definition
| a cutting style that combines brilliant-cut and step-cut facets |
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Term
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Definition
| lower part of a faceted gem below the girdle |
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Term
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Definition
| final stage in gem cutting that produces the smoothest possible surface |
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Term
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Definition
| rough ground to the approximate shape of the finished stone; also, the act of producing this shape |
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Term
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Definition
| the angles and relative measurements of a polished gem, and the relationships between them |
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Term
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Definition
| dividing gem rough into easily handled pieces and removing waste areas |
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Term
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Definition
| cutting style with mainly square and rectangular facets arranged in concentric rows |
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Term
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Definition
| the arrangement of a stone's facets |
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Term
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Definition
| the precision and balance of the corresponding parts of a finished gem |
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Term
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Definition
| facet at the top of the crown, usually the largest facet on the stone |
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