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 đá quí.

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Diamond Description

Diamond History & Lore

Diamond Journey

Birthstones và Anniversaries

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

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 kim cương.

1 in 1,000,000

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


Mineral: Diamond Chemistry: C Color: Colorless Refractive sầu Index: 2.42 Birefringence: None Specific Gravity: 3.52 (+/-0.01) Mohs Hardness: 10


There are a number of processes used lớn alter the color, apparent clarity, or improve the durability of gems.

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Some gemstones have sầu synthetic counterparts that have essentially the same chemical, physical, and optical properties, but are grown by man in a laboratory.

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Any gem can be imitated—sometimes by manmade materials or by natural materials chosen by man khổng lồ impersonate a particular gem.

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Why We Love sầu This Gemstone



Clarity grades assess the number, kích thước, relief, và position of inclusions and blemishes.



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



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

Carat Weight


Rarity means larger diamonds of the same unique are worth more per carat.


The Very Deep Origin of the World’s Biggest Diamonds

Evan M. Smith, Steven B. Shirey, và Wuyi Wang , Jan 26, 2018 Read Article

Diamonds from the Deep: How Do Diamonds Form in the Deep Earth?

Karen V. Smit & Steven B. Shirey , Feb 1, 2019 Read Article

Found in lava, meteorites, & deep in the earth’s mantle, yellow-green peridot is the extreme gem.

Fancy Màu sắc Diamond

Dazzling brilliance. Captivating color. These are the planet’s most valued gems.


Emerald is the bluish green to lớn green variety of beryl, a mineral species that includes aquamarine.

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