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Catalogue updated: 22-04-2012
Total designs: 29
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Technical Information

Please find below technical information on stone cuts and weights and informtion to help you to convert metals and waxes into coresponding weights. 

Round brilliant cut diamond, ct weight and mm diameter 

Carat ct Diameter mm
0.003-4 0.7 - 0.9
0.005-6 0.9 - 1.0
0.007-8 1.0 - 1.2
0.01 1.2 - 1.3
0.015 1.3 - 1.6
0.02 1.7
0.03 1.7 - 2.0
0.04 2.1-2.2
0.05 2.3
0.06 2.4 - 2.5
0.07 2.6
0.08 2.7
0.09 2.8 - 2.9
0.10-11 3.0 - 3.1
0.12-13 3.1 - 3.2
0.14-17 3.3 - 3.6
0.18-22 3.7 - 3.9
0.23-28 3.9 - 4.1
0.29-37 4.1 - 4.6
0.38-44 4.6 - 4.9
0.45-49 4.9 - 5.0
Carat ct
 Diameter mm
0.50 5.2
0.60 5.5
0.70 5.8
0.80 6.1
0.90 6.3
1.00 6.5
1.10 6.7 
1.20 6.9
1.30 7.1
1.40 7.3
1.50 7.5
1.60 7.6
1.70 7.8
1.80 7.9
1.90 8.1
2.00 8.2
2.50 8.9
3.00 9.4
3.50 9.9
4.00 10.3
5.00 11.2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fancy cuts, diamond ct weight to mm dimentions

Carat ct Oval in mm Pear in mm Marquise in mm Trilliant in mm Emerald in mm
0.07 - 0.12 3.50 x 2.50 3.75 x 2.50  4.00 x 2.25  3.50  
0.13 - 0.17 4.00 x 3.00 4.25 - 3.00  4.75 x 2.50  4.00  
0.18 - 0.22 4.50 x 3.25 4.50 - 3.25  5.25 x 2.75 4.25  4.00 x 3.00
0.23 - 0.28 5.00 x 3.50 5.00 x 3.50  6.00 x 3.00  4.75  4.25 x 3.25
0.29 - 0.36 5.25 x 3.50 5.50 x 3.50  6.50 x 3.25  5.00  4.75 x 3.25
0.37 - 0.44 5.50 x 3.75 6.00 x 3.75  7.00 x 3.50  5.50  5.00 x 3.50
0.45 - 0.67 6.00 x 4.00 6.50 x 4.00  8.00 x 4.00  6.00  5.50 x 3.75
0.68 - 0.88 6.75 x 4.75 7.00 x 4.50  9.00 x 4.50  7.00  6.50 x 4.25

 Carat ct Straight & tapered baguettes in mm
0.03 2.00 x 1.25
0.04 2.00 x 1.50
0.03 2.25 x 1.25
0.04 2.25 x 1.50
0.04 2.50 x 1.25
0.05 2.50 x 1.50
0.06  2.50 x 1.75
0.04  2.75 x 1.25
0.06  2.75 x 1.50
0.07  2.75 x 1.75
0.07  2.75 x 2.00
0.05  3.00 x 1.25
0.06  3.00 x 1.50
0.08  3.00 x 1.75
0.12  3.50 x 2.00
0.12 3.50 x 2.25
0.15 3.50 x 2.50
0.06 3.75 x 1.25
0.07 3.75 x 1.50
0.10 3.75 x 1.75
0.13 3.75 x 2.00
0.14 3.75 x 2.25
0.06 4.00x 1.25
0.08 4.00 x 1.50
0.10 4.00 x 1.75
0.13 4.00 x 2.00

Carat ct  Princess in mm
 0.02  1.40 x 1.40
 0.02  1.50 x 1.50
0.025 1.60 x 1.60
0.03 1.70 x 1.70
0.035 1.80 x 1.80
0.04  1.90 x 1.90
0.05  2.00 x 2.00
0.06
2.10 x 2.10
0.07 2.20 x 2.20
0.08 2.30 x 2.30
0.09 2.40 x 2.40
0.10 2.50 x 2.50
0.11 2.60 x 2.60
0.12 2.70 x 2.70
0.13 2.80 x 2.80
0.14 2.90 x 2.90
0.15 3.00 x 3.00
0.16 3.10 x 3.10
0.16 - 0.22  3.20/3.40 x 3.20/3.40
0.23 - 0.28  3.40/3.60 x 3.40/3.60
0.29 - 0.36  3.70/3.80 x 3.70/3.80
 0.37 - 0.44  3.90/4.20 x 3.90/4/20
 0.45 - 0.67  4.30/4.60 x 4.30/4.60
0.67 - 0.68 4.70/4.80 x 4.70/4.80
0.68 - 0.88 4.90/5.00 x 4.90/5.00

 


Metal and wax weight conversion

 
Platinum
Fine Gold
22ct Gold
18ct Gold
14ct Gold
9ct Gold
Silver
Brass
Wax 
Platinum
1 
 0.90
0.83 
 0.72
 0.60
 0.52
0.48 
0.40
 0.05
Fine Gold
 1.11
 1
0.92 
0.80 
 0.67
 0.58
0.53
0.45 
 0.05
22ct Gold
 1.21
 1.08
 1
 0.87
 0.73
 0.63
0.58
0.49
 0.06
18ct Gold
 1.39
 1.25
 1.15
 1
0.84 
0.72 
 0.66
 0.56
 0.06
14ct Gold
 1.65
 1.48
 1.37
 1.19
 1
 0.86
 0.79
 0.67
 0.08
9ct Gold
 1.92
 1.72
1.59 
1.38 
 1.16
 1
 0.92
 0.78
 0.09
Silver
 2.09
 1.87
 1.73
 1.50
 1.26
 1.09
1 
 0.84
 0.10
Brass
 2.47
 2.22
 2.05
 1.78
 1.49
 1.29
1.18 
1 
 0.11
Wax
 21.50
 19.30
 17.80
 15.50
 13.00
 11.20
10.30 
 8.70
 1

To calculate the approximate weight of an article in other metal standard, select the metal standard of the known article in the left hand column and read across the chart to apply the factor by which the weight must be multiplied.

                   Please note that all given weights, sizes and calculations are for guidance only.

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