Gemstone Colors

Each gemstone is unique with a special color birthplace and story. Gemstone come in every colour of the rainbow and are gathered from all corners of the world. With each coloured gemstone possessing a unique creation of beautiful colour. Some gemstone have been treasured since before history began and others were only discovered recently.

Color has three components that are main Hue, Tone and Saturation.

Hue is referred to as the shade, sensation or tint of a color. The GIA GemSet® has 31 Hues which are often used to spell it out virtually all gemstone colours. The GIA that is complete GemSet has 324 sample hue colors with varying Tones and Saturations.

Tone is referred to as the lightness that is relative darkness of a Hue. The GIA Tone Scale is divided in to 11 grades, 0 to 10, with 0 being colorless to 10 being black.

Saturation is referred to as the purity or strength of a Hue. The GIA Saturation Scale is from 1 to 6. The reduced numbers (1, a few) of warm colors such as for example red, orange or tend that is yellow look brownish in addition to cool colors such as for example blue and green have a tendency to look grayish. Level 4 no more shows either brownishness or grayishness, while neither is strong or weak. Level 5 is level and strong 6 being vivid, almost over colored.

Various Gemstone Colors

gemstone colour scale

gemstone colors scale

GIA Hue, Tone & Saturation Scales

How Color is described using the GIA Color Grades for Colored Gemstones.

Hue

 

Tone

 

RP/PR

Red-Purple or Purple-Red   0 C – Colorless/white

stpR

strongly purplish Red  

 

1 EXL – Extremely Light

slpR

slightly purplish Red   2 VL – Very Light

R

Red   3 L- Light

oR

orangy Red   4 ML – Medium Light

RO/OR

Red-Orange or Orange-Red 5 M – Medium

rO

reddish Orange 6 MD – Medium Dark

O

Orange 7 D – Dark

yO

yellowish Orange 8 VD – Very Dark

Y

Yellow 9 EXD – Extremely Dark

gY

greenish Yellow

YG/GY

Yellow-Green or Green-Yellow

styG

strongly yellowish Green

yG

yellowish Green

slyG

slightly yellowish Green

G

Green

vslbG

very slightly bluish Green

bG

bluish Green

vstbG

very strongly bluish Green

GB/BG

Green-Blue or Blue-Green

vstgB

very strongly greenish Blue

gB

greenish Blue

vslgB

very slightly greenish Blue

B

Blue

vB

violetish Blue

bV

bluish Violet

V

Violet

bP

bluish Purple

P

Purple

rP

reddish Purple
 

Saturation

gr(br)

grayish(brownish)

slgr(br)

slightly grayish(brownish)

vslgr(br)

very slightly grayish(brownish)

mst

moderately strong

s

strong

v

vivid
 

Exceptions (Saturation)

pk

pink

brn

brown

Color by Spectrum Exceptions (Saturation)

w

white

n

none, colorless or clear

b

black