The Very Highest Quality Diamond Rings...


The Perfect DiamondClick here to return to FAQ IndexChard 24 Carat Home Page

Chard - for the highest quality diamonds
Q: How much would a perfect diamond cost?
Q: Is this a perfect diamond?
I believe that there is no such thing as the perfect diamond.

If you have read our section about Diamond Qualities, you will know that a certified D colour, Internally Flawless clarity diamond is the best you can get. Some would say it is perfect. Remember, though, that diamonds are graded under 10x magnification. A diamond that shows no visible inclusions under 10x magnification would almost certainly show some under 20x, or higher, magnification.

Even the use of 10x magnification for grading diamonds is quite arbitrary. There is no reason why 5, 8, 15, 20, or any other factor could not have been chosen. The standard tool used by most jewellers world-wide is now a 10x hand held "loupe" (French for magnifying glass).

The answer to our second question, above, is therefore, if it is D ,IF, and well made, then yes it is not really possible to get better, only bigger.

The next problem is that D, Flawless diamonds are rare and expensive. To be able to answer the first question, we need to know how big your idea of the perfect diamond would be.

The following table shows the estimated UK retail price of a D, Flawless diamond in various carat weights. Prices shown are for the diamond only, and do not include the mount, or the cost of the grading certificate.

Retail Prices for D Colour, Flawless Clarity, Diamonds
Carat Weight per CaratTotal
.011,70017
.05 1,70085
.10 2,000200
.15 2,400360
.20 2,650530
.25 4,0001,000
.30 7,8002,340
.35 8,0002,800
.40 8,3003,320
.45 9,0004,050
.49 10,0004,900
.50 13,000 6,500
.55 13,000 7,150
.60 13,000 7,800
.65 13,000 8,450
.70 14,000 9,800
.75 14,000 10,500
.80 14,000 11,200
.85 14,000 11,900
.90 14,600 13,140
.95 14,600 13,870
.99 15,000 14,850
1.0026,000 26,000
1.2526,000 32,500
1.5028,300 42,450
1.75 28,300 49,525
1.99 29,000 57,710
2.00 41,300 82,600
2.50 42,000 105,000
2.99 43,000 128,570
3.00 64,300 192,900
3.5 65,000 227,500
3.99 65,500 261,345
4.00 67,500 270,000
4.50 68,000 308,250
4.99 70,000 349,000
5.00 90,000 450,000
5.50 90,000 495,000
6.00 100,000600,000
7.00 110,000770,000
8.00 120,000960,000
9.00 135,0001,215,000
10.00150,0001,500,000

In practice, you would have difficulty finding small diamonds offered for sale with a grading certificate. The published trade prices from the GIA (Gemmological Institute of America), and the GAGTL (Gemmolical Association and Gem Testing Laboratory of Great Britain) start at about 100 even for the smallest stones, up to about 0.70 carats, rising to about 150 for a 1 carat, 220 for a 2 carat. Certificates from other laboratories, unless a CIBJO member, can be obtained for less, but are not universally recognised, and usually not worth the paper on which they are written.


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