Every Color of the Rainbow 40 colorful diamonds ranging in size from 0.4 to 9.49 carats will be displayed at the National Museum of Natural History beside the Winston Red Diamond (far right).

Beginning later this year, GIA (the Gemological Institute of America) will start using descriptive terms to characterize the ...

The Gemological Institute of America (GIA) has decided to stop using its 4Cs grading system for lab-grown diamonds. This move ...

Only about 30 percent of natural diamonds are considered gem-worthy, and among those, less than 1 percent are fancy color diamonds—that is, diamonds of unusual color. While the latter come in ...

Color Spectrum: While diamonds are often associated with the traditional white color, they come in a wide array of natural hues – but only 1 in 10,000 diamonds is a fancy color. These colors are ...

color, clarity and carat — grading system as natural gems. The big question — can you tell if a diamond was human-made or ...

A lab-grown diamond looks just as beautiful as a natural diamond but is available ... They’ve got something most diamonds don’t – deep, rich color – yet they play well with diamonds.

A diamond, the color of blood. Some, like the people at the Smithsonian Institution’s National Museum of Natural History, will tell you the 2.33 carat diamond colored like the water of life that ...

Only about 30 percent of natural diamonds are considered gem-worthy, and among those, less than 1 percent are fancy color diamonds—that is, diamonds of unusual color. While the latter come in ...

color, clarity and carat — grading system as natural gems. The big question — can you tell if a diamond was human-made or mined? Both stones are optically the same, meaning they will look the ...