The Main Laboratories

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About Colors

Natural Color Diamond Definition

The Origin of Color

What is Color? About Natural Color Diamonds

Other Colored Gems

Rubies, Sapphires and Emeralds Precious Stones Definition

Treated and Synthetic Diamonds

Introduction Treated Natural Diamonds Synthetic or Lab Grown Diamonds

Quality Grading

The Role of Laboratories

Grading Colorless Diamonds

History of Diamond Grading The Main Laboratories The 4Cs Fluorescence Colorless Diamonds Certificates

Grading Natural Color Diamonds

History of Natural Color Diamond Grading Grading of Color Diamonds Debates Around Color Grading Natural Colour Diamonds and the 4 Cs Fluorescence How to Read a Natural Color Diamond Certificate

History

Historical Origins

India

Jean-Baptiste Tavernier

Brazil (1730-1870)

Borneo

South Africa (1870-1920)

The 1920's

Renewed Interest (1970)

Natural Color Diamonds in the 21st Century

Famous color diamonds

Allnatt - Fancy Vivid Yellow - 102.29 ct Ashberg - Ambre - 102.48 ct Black Orlov - Black - 67.50 ct Blue Heart - Deep Blue - 30.82 ct Blue Moon - Fancy Vivid Blue - 12.03 ct Darya-I Nur - Pale Pink - 175.19 ct De Young Red - Fancy Dark Reddish Brown- 5.03 c Dresden Green - Fancy Green - 41.00 ct Florentine - Light Yellow - 139.00 ct Golden Jubilee - Gold Brown - 755.50 ct Graff Imperial Blue - Fancy Blue - 39.81 ct Graff Pink - Fancy Intense Pink - 24.78 ct Grand Condé - Fancy Pink - 9.01 ct Great Chrysanthemum - Golden Brown 104.15 ct Gruosi - Black - 115.34 ct Hope - Sapphire - Fancy Dark Grayish Blue - 45.52 ct Hortensia - Light Orangey Pink - 20.53 Incomparable - Fancy Brownish Yellow - 407.48 ct Mouna - Intense Yellow - 112.53 ct Moussaieff Red - Red - 5.11 ct Orlov - Slightly Bluish Green - 189.60 ct Porges - Yellow - 78.53 ct Princie - Intense Pink - 34.65 ct Pumpkin - Vivid Orange - 5.54 ct Red Cross - Canary Yellow- 205.07 ct Tereschenko - Blue - 42.92 ct Tiffany - Canary yellow - 287.42 ct Wittelsbach - Dark Blue - 35.50 ct

People

Geography

Angola

Australia: Argyle

Borneo

Brazil

British Guyana

Canada and New Production

Central African Republic

China

Democratic Republic Of The Congo

Guinea

Ivory Coast

Russian Federation

Sierra Leone

South Africa

Tanzania

Venezuela

From rough to cut

Honey Color Heart Shape Diamond

Olive Cushion Cut Diamond

Bronze Color Radiant Cut Diamond

Canary Yellow Radiant Cut Diamond

Raspberry Pink Radiant Cut Diamond

Burgundy Radiant Cut Diamond

Old Rose Oval Diamond

Jonquille Oval Diamond

Burgundy Step Cut Diamond

Burgundy Radiant Cut Diamond

Old Rose Round Brilliant Cut Diamond

The Main Laboratories

Since the creation of the GIA in 1931, other laboratories have appeared and are now renowned institutions:

GIA (Gemological Institute of America): founded in 1931 in the US.

AGS (American Gemological Society): founded in 1934 in the U.S.

GCL (Central Gem Laboratory): founded in 1970 in Tokyo.

HRD (Hoge Raad voor Diamant, or Diamond High Council): founded in 1973 in Antwerp.

EGL (European Gemological Laboratory): founded in 1974 in Belgium.

IGI (International Gemological Institute): founded in 1975 in Antwerp.