Proportion

pro·por·tion | prə-ˈpȯr-shən

noun

A mathematical representation of a gemstone's overall symmetry

Proportions are the mathematical representation of gemstone’s surfaces and overall symmetry based on the type of cut that is used. For a diamond, there are several elements that need to be properly proportioned based on the cut, including table size, star length, crown height, crown angle, pavilion angle, total depth, pavilion depth, girdle thickness, lower girdle facet length, and the culet. These are all elements that are carefully measured and managed by the cutter of a gemstone to ensure it matches not only industry standards for a specific type of stone cut, but also the practical application of the stone being cut.

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

P Padparadscha Sapphire Paillons Palladium Pampilles Parure Passamenterie Paste Patina Pattern Pave Pavilion Pear Cut Pearl Peek-a-boo Diamond Pendaloque Pendant Peridot Petite Pewter Pietra Dura Pinchbeck Pique Pit Planishing Platinum Plique-a-jour Plot Point Polished Pomander Popigai Crater Poseidon Posy Ring Pot Metal Precious Gemstone Precious Metal Princess Cut Prong Setting Proportion Proposal