Loose Diamond Definitions: I

Ideal Cut-Those proportions and facet angles calculated mathematically by Marcel Tolkowsky to produce maximum brilliancy.

Imperfection-A general term used to refer to any external blemish or internal inclusion or flaw on or in a fashioned diamond. The term “flaw” and “imperfection” are usually used interchangeably.

Included Crystal-A mineral crystal contained in a Diamond.

Inclusion - Imperfection internal to the Diamond.

Internal Graining - Internal indications of irregular crystal growth. May appear milky, with faint lines or streaks, or may be colored.

Iridescence - Prismatic colors inside or on the surface of a material caused by light interference from thin layers of differing refractive indices.

Irradiated diamond-A diamond that has been exposed to radiation.

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