DIAMOND ESSENTIALS 3 TERMS / TEST
100% ACCURATE
Each letter grade in the GIA Color Scale represents - ANSWER A range of color
On the GIA Color Scale, the top grade in the normal color range is - ANSWER D
The most common color of fluorescence in gem-quality diamond is - ANSWER Blue
The most commonly encountered colors among colored diamonds are - ANSWER
Brown and yellow
Which master stone does the GIA Laboratory use to determine the point where a yellow
diamond transitions to the colored diamond grading scale? - ANSWER Z
The price differences between colorless diamonds and near-colorless diamond are due
primarily to - ANSWER Rarity
To color grade a light yellow or brown diamond, graders compare it to a master stone
for - ANSWER Tone and saturation
Characteristic color - ANSWER The basic face-up color of a colored diamond
Colored diamonds - ANSWER Yellow, brown, and gray diamonds with more color than
the Z masterstone, or that exhibit any other color face-up
Depth of color - ANSWER The combination of tone and saturation that determines how
noticeable a color is
Fluorescence - ANSWER Emission of visible light by a material when its exposed to
ultraviolet radiation
Hue - ANSWER Your first impression of a color; the basic color of an object
Irradiation - ANSWER A treatment that changes the color by exposing it to radioactive
materials
Masterstones - ANSWER A set of color comparison diamonds that defines GIA's
diamond color grades in the normal range (D-Z)
Near-colorless - ANSWER A general term for diamond in the G-J color range
Normal color range - ANSWER Range of diamond colors from colorless to light yellow,
brown, and gray
100% ACCURATE
Each letter grade in the GIA Color Scale represents - ANSWER A range of color
On the GIA Color Scale, the top grade in the normal color range is - ANSWER D
The most common color of fluorescence in gem-quality diamond is - ANSWER Blue
The most commonly encountered colors among colored diamonds are - ANSWER
Brown and yellow
Which master stone does the GIA Laboratory use to determine the point where a yellow
diamond transitions to the colored diamond grading scale? - ANSWER Z
The price differences between colorless diamonds and near-colorless diamond are due
primarily to - ANSWER Rarity
To color grade a light yellow or brown diamond, graders compare it to a master stone
for - ANSWER Tone and saturation
Characteristic color - ANSWER The basic face-up color of a colored diamond
Colored diamonds - ANSWER Yellow, brown, and gray diamonds with more color than
the Z masterstone, or that exhibit any other color face-up
Depth of color - ANSWER The combination of tone and saturation that determines how
noticeable a color is
Fluorescence - ANSWER Emission of visible light by a material when its exposed to
ultraviolet radiation
Hue - ANSWER Your first impression of a color; the basic color of an object
Irradiation - ANSWER A treatment that changes the color by exposing it to radioactive
materials
Masterstones - ANSWER A set of color comparison diamonds that defines GIA's
diamond color grades in the normal range (D-Z)
Near-colorless - ANSWER A general term for diamond in the G-J color range
Normal color range - ANSWER Range of diamond colors from colorless to light yellow,
brown, and gray
