Guide to Diamond & Gem Shapes
Diamonds and gemstones are cut into many different shapes, each with their own aesthetic and cutting requirements. While diamond and gem shapes are sometimes referred to as the cut (for example an emerald-cut diamond), the cut refers to how a jeweler cuts the gemstone to achieve its symmetry and proportion.
Most people are familiar with the round solitaire diamond and common “fancy” shapes — which refer to a gemstone cut in any shape other than round. Fancy cuts include such shapes as baguette, emerald, triangle, pear, princess, oval and marquis. If you are uncertain about a term used to describe your diamond, ask your professional jeweler to clarify it for you.
Use our chart of diamond and gemstone shapes to identify your favorite:
Gem cutters work to achieve a pleasing and affordable mix of color, weight and a safe shape for mounting. During creation, a gemstone’s size is constrained by nature. For example, while large and beautiful amethysts are readily available, an alexandrite of large size is extremely rare.
Sparkle adds to the beauty of a well-cut colored gemstone. The cut of a colored gemstone describes its shape and how it is fashioned. Some gemstones, such as opal, are suited to a smooth, rounded surface. Others, such as sapphire, are more frequently shaped with a precise series of flat, symmetrical planes, called facets, which make the most pleasing illumination of the gem’s color. Some cutters today may also use convex or concave facets, shaping colored gemstone like small sculptures.
Information courtesy of Jewelers of America.