Diamond

Diamonds are among nature’s most precious and beautiful creations.

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BIRTHSTONES &
ANNIVERSARIES

On almost all modern birthstone lists, diamond is recognized today as the birthstone for April. Diamond is also the gem that marks the 60th and 75th wedding anniversaries.

 

ABOUT DIAMOND

Diamond forms under high temperature and pressure conditions that exist only about 100 miles beneath the earth’s surface. Diamond’s carbon atoms are bonded in essentially the same way in all directions. Another mineral, graphite, also contains only carbon, but its formation process and crystal structure are very different. Graphite is so soft that you can write with it, while diamond is so hard that you can only scratch it with another diamond.


WHY WE LOVE THIS GEMSTONE

58X HARDER

Diamonds are the hardest material on earth: 58 times harder than anything else in nature.

“LUCY” IN THE SKY

Fifty light years from earth, this star is a 10 billion-trillion-trillion carat diamond.

1 IN 1,000,000

The average yield in most diamond mines is 1 part diamond to 1 million parts host rock.

GLOBAL LANGUAGE

The 4Cs, created by GIA, are considered the global language of diamond quality.

CARBON

Diamond is the only gem composed of one single element: carbon.

A BILLION YEARS

Liddicoatite tourmaline was named for beloved
former GIA President Richard T. Liddicoat.


QUALITY FACTORS

The human contribution to a diamond’s beauty is a well-executed cut.

CUT Cut (proportions, symmetry, and polish) is a measure of how a diamond’s facets interact with light.

CUT
Cut (proportions, symmetry, and polish) is a measure of how a diamond’s facets interact with light.

COLOR The less color, the higher the grade. Even the slightest hint can make a dramatic difference in value.

COLOR
The less color, the higher the grade. Even the slightest hint can make a dramatic difference in value.

CLARITY Clarity grades assess the number, size, relief, and position of inclusions and blemishes.

CLARITY
Clarity grades assess the number, size, relief, and position of inclusions and blemishes.

CARAT WEIGHT Rarity means larger diamonds of the same quality are worth more per carat.

CARAT WEIGHT
Rarity means larger diamonds of the same quality are worth more per carat.