Loose Diamond Definitions: R

Radiant Cut- A type of brilliant cut fancy shape that resembles a square or rectangle with the corners cut off.

Red Diamond-The rarest of all fancy-colored diamonds. However, the term is often used to mean red-brown or rose-colored stones. Diamonds of an intense red color approaching that of ruby are excessively rare.

Reflection-The return of light that strikes the surface of stone.

Refraction-The bending of light rays.

Rose Cut-An early style of cutting that is thought to have originated in India and to have been brought to Europe by the Venetians.

Rough-Any uncut or unpolished gem material.

Rough Girdle-If a diamond is rounded up too quickly in the fashioning process, the surface of the girdle, instead of having the smoothness and waxy luster of a finely turned girdle, will be rough or granular.

Round Brilliant Cut-The most common cut usually containing 58 facets. Also the most brilliant cut, in terms of most efficient use of light to increase brilliance and fire, hence the name.

Round Cut-The most common style of cutting for both diamonds and colored stones.

Rounding Up-The step in the fashioning process of a diamond in which the stone is given a circular shape.

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