The average cost of a half-carat diamond is between $1,500 and $2,500, as of September 2014. While size is an important factor, cut, color and clarity also play a role when pricing diamonds. More »

As of April 2015, a 2-carat diamond ring can cost anywhere from around $11,000 to as much as $97,000 or more, according to The Diamond Registry. A ring that has a 2-carat diamond is more expensive than a ring with a 1-ca... More »

A 1-carat diamond ring is a piece of jewelry that features a 1-carat weight diamond or multiple diamonds totalling 1 carat affixed to a circular band, which is usually made out of a precious metal. The ring is meant to b... More »

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Naturally black diamonds are extremely rare and can have a very high value, depending on the cut, color, clarity and carat size of the diamond. The most accurate way to learn the value of a black diamond is to have it ap... More »

Determining the quality of a diamond involves the consideration of its cut, clarity, color, carat size and certification. Certification through an accredited organization, such as the American Gem Society or the Gemologi... More »

To determine the value of a diamond, note its color, clarity, cut and carat. Diamonds are more valuable when they have less color, lack spots and imperfections, have higher cut grades and weigh more. Compare each of thes... More »

According to the second edition of the Standard Catalog of Gem Values, wholesale prices for faceted gem rubies range from $100 to $15,000 per carat. Wholesale prices vary based on color, size, origin and clarity. More »