The 5 C's, carat weight

The Spark of Confidence

Carat Weight

The weight of a diamond is expressed in carats. 1 carat equals 0.2 grams. A carat is further subdivided into 100 points.

0.50 ct = 1/2 carat = 50 points.

Weight is the most obvious factor in determining the value of a diamond. But two diamonds of equal weight can have very unequal values, depending on their quality. Furthermore weight only indicates size. Depending on proportions two diamonds weighing the same may appear very different in size. Internationally, the weight of a diamond is mentioned to two decimal places.

Roll your mouse over the diamonds below to compare their Carat Weight:

Note: Due to the differences between monitors and resolutions settings, the sizes shown here are not accurate. They are only meant to be an educational guide.

latest news

Tuesday 21 March, 2017

59.6 CARAT VIVID PINK DIAMOND

Sotheby's plans to auction the famous "Pink Star" diamond an internally flawless, fancy vivid pink stone at its sale in Hong Kong on April 4.

Wednesday 8 March, 2017

GIA FINDS SIGNIFICANT UNDISCLOSED SYNTHETICS

The Gemological Institute of America (GIA) recently uncovered an unusually large number of undisclosed synthetic diamonds mixed in with natural melee diamonds, the lab confirmed with Rapaport News on Monday.

Tuesday 21 February, 2017

DE BEERS PROFIT JUMPS AS DIAMOND MARKET STABILISES

Profit more than doubled for De Beers last year as trading conditions in the diamond-manufacturing sector improved and inventory levels stabilized.

Wednesday 14 December, 2016

DCLA DIAMONDS HAS LAUNCHED

Buying a diamond can be a difficult process.

Thursday 17 November, 2016

PINK DIAMOND SELLS FOR $18M AT CHRISTIE’S GENEVA

Christie’s a pink diamond at its Magnificent Jewels auction in Geneva on Tuesday at $2 million per carat.

Wednesday 9 November, 2016

BAIN CAPITAL AND BOW STREET TO ACQUIRED BLUE NILE

In a surprise announcement, online jeweller Blue Nile has entered into an agreement to be acquired by an investor group managed by Bain Capital Private Equity and Bow Street LLC.

Thursday 3 November, 2016

GRAFF SHOWCASES THE GRAFF VENUS

The 118.78 carat type IIa diamond with no fluorescence and an excellent polish and symmetry. Is a record for a heart shape.