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Diamond Carat

Carat - The easiest of the five c's to understand. The "carat" is a measure of weight. The larger the diamond is the larger the carat weight figure will be. Many times you will hear the term "points" in reference to diamond weight. If you think of 1 carat as 1.00 dollar, then a ¾ carat diamond is .75 cents or 75 "points". It is expressed as .75 ct. When you see ".ctw" after a weight it means that more than one diamond adds up to a total combined weight of three quarters of a carat. CTW means "carat total weight".

It is important to understand that the value of diamonds increases exponentially. By that we mean that a one carat diamond (1.00 ct) can cost much more that simply twice the price of a half carat diamond (.50 ct) even though it weighs twice as much.

Diamond Shape and Carat Reference:

Emerald

Weight in Ct. 0.500.75 1.001.25 1.502.00 2.503.00
Emerald Emerald Shape Diamond - 0.50 CaratEmerald Shape Diamond - 0.75 Carat Emerald Shape Diamond - 1.00 CaratEmerald Shape Diamond - 1.25 Carat Emerald Shape Diamond - 1.50 CaratEmerald Shape Diamond - 2.00 Carat Emerald Shape Diamond - 2.50 CaratEmerald Shape Diamond - 3.00 Carat
LxW in mm. 6x47x4.5 7x58x5 8.5x5.59x5.5 9.5x610.5x6

Marquise

Weight in Ct. .04.06 .08.11 .15.20 .25.38.50
Marquise Marquise Shape Diamond - .04 CaratMarquise Shape Diamond - .06 Carat Marquise Shape Diamond - .08 CaratMarquise Shape Diamond - .11 Carat Marquise Shape Diamond - .15 CaratMarquise Shape Diamond - .20 Carat Marquise Shape Diamond - .25 CaratMarquise Shape Diamond - .38 CaratMarquise Shape Diamond - .50 Carat
LxW in mm. 3x1.53.5x1.84x2 4.5x2.25x2.5 5.5x2.86x3 7x3.58x4

Oval

Weight in Ct. 0.500.75 1.001.25 1.502.00 2.503.00
Oval Oval Shape Diamond - 0.50 CaratOval Shape Diamond - 0.75 Carat Oval Shape Diamond - 1.00 CaratOval Shape Diamond - 1.25 Carat Oval Shape Diamond - 1.50 CaratOval Shape Diamond - 2.00 Carat Oval Shape Diamond - 2.50 CaratOval Shape Diamond - 3.00 Carat
LxW in mm. 6x47x5 7.5x58x5.5 9x69x6.5 9.5x6.510.5x7

Pear

Weight in Ct. 0.500.75 1.001.25 1.502.00 2.503.00
Pear Pear Shape Diamond - 0.50 CaratPear Shape Diamond - 0.75 Carat Pear Shape Diamond - 1.00 CaratPear Shape Diamond - 1.25 Carat Pear Shape Diamond - 1.50 CaratPear Shape Diamond - 2.00 Carat Pear Shape Diamond - 2.50 CaratPear Shape Diamond - 3.00 Carat
LxW in mm. 7x48x5 9x59.5x5.5 10x611x6.5 12x713x8

Princess

Weight in Ct. .02.05 .10.16 .27.41 .52.65
Princess Princess Shape Diamond - .02 CaratPrincess Shape Diamond - .05 Carat Princess Shape Diamond - .10 CaratPrincess Shape Diamond - .16 Carat Princess Shape Diamond - .27 CaratPrincess Shape Diamond - .41 Carat Princess Shape Diamond - .52 CaratPrincess Shape Diamond - .65 Carat
Length in mm. 1.52.0 2.53.0 3.54.00 4.505.00

Round

Weight in Ct. .02.03 .05.10 .20.25 .35.40
Round Round Shape Diamond - .02 CaratRound Shape Diamond - .03 Carat Round Shape Diamond - .05 CaratRound Shape Diamond - .10 Carat Round Shape Diamond - .20 CaratRound Shape Diamond - .25 Carat Round Shape Diamond - .35 CaratRound Shape Diamond - .40 Carat
Dia. in mm. 1.82.0 2.43.0 3.84.1 4.54.7

Trillion

Weight in Ct. .05.07 .12.16 .25.32 .40
Trillion Trillion Shape Diamond - .05 CaratTrillion Shape Diamond - .07 Carat Trillion Shape Diamond - .12 CaratTrillion Shape Diamond - .16 Carat Trillion Shape Diamond - .25 CaratTrillion Shape Diamond - .32 Carat Trillion Shape Diamond - .40 Carat
Length in mm. 2.53.0 3.54.0 4.55.0 5.5

What size (carat) diamond should I buy?

  • First figure out your budget. Some will say that two month salary is what you should spend on a diamond. I say its bunkers. You spend however much you are comfortable spending. Do not listen to industry experts when it comes as to how much you should spend on the diamond, instead consult your own bank account I am almost certain that source of information will be much more honest with you.
  • When making a decision on size of the diamond keep in mind that you are dealing with balance between the quantity and quality. You may pay for instance $1000.00 for a two carat diamond or pay $5000.00 for a one carat diamond. This decision is strictly a personal preference. I for instance went for smaller rock which had nearly flawless clarity
  • Here is a trick that may help you. Slender fingers make the diamond look larger than it really is.
 
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