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Prices based on London PM Fix (Last Updated: October 18, 2017)

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This table helps explain one of the easiest ways to compare diamonds to cubic zirconians. As you can see the diamond weight (d.w.) and the cubic zirconian weight (c.z.w.) for a similarly sized stone is drastically different, with the cubic zirconian weight (c.z.w.) being heavier.


 

Round   Marquise
d.w. Size (mm) c.z.w.   d.w. Size (mm) c.z.w.
0.010 1.25 0.020   0.25 6 x 3 0.50
0.020 1.5 0.030   0.50 7 x 3.5 0.75
0.025 1.75 0.030   0.75 8 x 4 1.25
0.030 2 0.050   1.00 10 x 5 1.75
0.040 2.25 0.070   1.50 11 x 5.5 2.75
0.050 2.5 0.100   2.00 12 x 6 3.25
0.070 2.75 0.140        
0.100 3 0.190   Pear
0.130 3.25 0.250   d.w. Size (mm) c.z.w.
0.160 3.5 0.300   0.25 5 x 3 0.50
0.200 3.75 0.350   0.50 6 x 4 0.75
0.250 4 0.450   0.75 7 x 5 1.25
0.280 4.25 0.500   1.00 8 x 5 1.75
0.350 4.5 0.600   1.50 9 x 6 2.75
0.450 4.75 0.850   2.00 10 x 7 3.25
0.500 5 1.000        
0.600 5.25 1.100   Heart
0.680 5.5 1.250   d.w. Size (mm) c.z.w.
0.750 5.75 1.450   0.25 4 x 4 0.50
0.900 6 1.600   0.50 5 x 5 0.75
1.000 6.25 1.800   0.75 6 x 6 1.25
1.150 6.5 2.000   1.00 6.5 x 6.5 1.75
1.250 7 2.250   1.50 7 x 7 2.75
1.500 7.5 2.850   2.00 8 x 8 3.25
1.750 7.75 3.300        
2.000 8 3.500   Emerald
2.250 8.5 4.000   d.w. Size (mm) c.z.w.
2.500 9 4.700   0.50 6 x 4 0.75
3.000 9.5 5.650   0.75 6.5 x 4.5 1.25
3.500 10 6.600   1.00 7 x 5 1.75
        1.50 8 x 6 2.75
Oval   2.50 9 x 7 5.25
d.w. Size (mm) c.z.w.   3.00 10 x 3 6.50
0.25 5 x 3 0.50        
0.50 6 x 4 0.75   Triangle
0.75 7 x 5 1.25   d.w. Size (mm) c.z.w.
1.00 7.5 x 5.5 1.75   0.10 3 0.20
2.00 9 x 7 3.25   0.14 3.5 0.25
3.00 10 x 8 5.25   0.18 4 0.33
        0.25 4.5 0.50
Square   0.33 5 0.60
d.w. Size (mm) c.z.w.   0.40 5.5 0.70
0.04 2 x 2 0.07   0.50 6 1.00
0.10 2.5 x 2.5 0.20   1.50 7 3.00
0.17 3 x 3 0.30        
0.23 3.5 x 3.5 0.40        
0.40 4 x 4 0.70        
0.50 5 x 5 1.00        
1.00 6 x 6 2.00        
1.25 7 x 7 2.50