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Home > Color > Color Grades > GIA

In attempts to render the different national descriptions and definitions of
terms uniformly on an international plane, the interested associations of the various nomenclature commissions were guided by the letter system of the GIA in America: To begin with the following comparisons resulted:

Comparison table of different color grading systems:

CIBJO 1974

RAL 560 A 5

GIA

German

International

"Old Terms"

Scan D.N.

Name

Name

D

Hochfeines Weiss

Exceptional

River

River

white; blanc

E

(Finest White)

exceptionnel

(R)

(rarest white)

F

Feines Weiss

Rare white

Top Wesselton

Top Wesselton

(Fine White)

Extra blanc

(TW)

(rare white)

G

Weiss

White

Wesselton

Wesselton

H

(White)

Blanc

(W)

(white)

I

Leicht get6ntes

Slightly tinted

Top Crystal

Top Crystal

Weiss (slightly

white

(TCR)

(slightly tinted

J'

tinted white)

Blanc nuance

white)

K

Crystal

Crystal

Get6ntes Weiss

Tinted white

(CR)

(tinted white)

(tinted white)

Legerement

L

teinte

Top Cape

Top Cape

(TCA)

(slightly yellowish)

M

Cape

Cape

Gelblich

Yellowish

(CA)

(yellowish)

N

(yellowish)

Teinte

Light Yellow

.1.0

(LY)

Light Yellow

Farbige Diamanten

Fancy diamonds

Fancy

Z

(colored

Diamants de

diamonds)

couleur speciale

colors

A few years later the boundaries of the upper color zones in relation to the "old terms" were altered once again to a minor extent in order to tally with the GIA, Scan.D.N. and CIBJO. The upper; half of the F zone is no longer classified with the color-grade River, but is unequivocally put down into the color grade Top Wesselton.

color Grades: Origin and Nomenclatures CIBJO color Table 1986