Colour and Value (Assignment 3)

Question 1

NEAR-COLORLESS

Answer 1

A general term for diamonds in the G-to-J color range.

Question 2

NORMAL COLOR RANGE

Answer 2

Range of diamond colors from colorless to light yellow, brown, and gray.

Question 3

HUES

Answer 3

Your first impression of a color; the basic color of an object.

Question 4

SATURATION

Answer 4

A color’s strength or intensity, ranging from a dull hue to a pure, vivid hue.

Question 5

TONE

Answer 5

A color’s degree of darkness or lightness.

Question 6

DEPTH OF COLOR

Answer 6

The combination of tone and saturation that determines how noticeable a color is.

Question 7

MASTERSTONES

Answer 7

A set of color comparison diamonds that defines GIA’s diamond color grades in the normal (D-to-Z) range.

Question 8

ULTRAVIOLET

Answer 8

Light wavelength that’s invisible to the human eye.

Question 9

FLUORESCENCE

Answer 9

Emission of visible light by a material when it’s exposed to ultraviolet radiation.

Question 10

COLORED DIAMONDS

Answer 10

Yellow, brown, and gray diamonds with more color than the Z masterstone, or that exhibit any other color face-up.

Question 11

CHARACTERISTIC COLOR

Answer 11

The basic face-up color of a colored ­diamond.

Question 12

IRRADIATION

Answer 12

A treatment that changes the color of a gem by exposing it to radioactive materials.

Question 13

ANNEALING

Answer 13

A gemstone heating process that can be used alone or to stabilize irradiated color.