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Standard Weight Chart    Carat / Piece

Shape Size Blue
Sapphire
Ruby Emerald Pink
Sapphire
Yellow
Sapphire
Orange
Sapphire
White
Sapphire
round normal cut 3.00 0.1504 0.1504 0.1053 0.1504 0.1504 0.1504 0.1504
round normal cut 3.50 0.2348 0.2348 0.1644 0.2348 0.2348 0.2348 0.2348
round normal cut 4.00 0.3687 0.3687 0.2581 0.3687 0.3687 0.3687 0.3687
round normal cut 4.50 0.5212 0.5212 0.3648 0.5212 0.5212 0.5212 0.5212
round normal cut 5.00 0.6839 0.6839 0.4787 0.6839 0.6839 0.6839 0.6839
round normal cut 6.00 1.2010 1.2010 0.8407 1.2010 1.2010 1.2010 1.2010
round diamond cut 1.00 0.0062 0.0062 0.0043 0.0062 0.0062 0.0062 0.0062
round diamond cut 1.25 0.0103 0.0103 0.0072 0.0103 0.0103 0.0103 0.0103
round diamond cut 1.50 0.0185 0.0185 0.0130 0.0185 0.0185 0.0185 0.0185
round diamond cut 1.75 0.0278 0.0278 0.0195 0.0278 0.0278 0.0278 0.0278
round diamond cut 2.00 0.0422 0.0422 0.0296 0.0422 0.0422 0.0422 0.0422
round diamond cut 2.25 0.0567 0.0567 0.0397 0.0567 0.0567 0.0567 0.0567
round diamond cut 2.50 0.0731 0.0731 0.0512 0.0731 0.0731 0.0731 0.0731
round diamond cut 2.75 0.1030 0.1030 0.0721 0.1030 0.1030 0.1030 0.1030
round diamond cut 3.00 0.1360 0.1360 0.0952 0.1360 0.1360 0.1360 0.1360
round diamond cut 3.50 0.2039 0.2039 0.1428 0.2039 0.2039 0.2039 0.2039
round diamond cut 4.00 0.3080 0.3080 0.2156 0.3080 0.3080 0.3080 0.3080
round diamond cut 4.50 0.4429 0.4429 0.3100 0.4429 0.4429 0.4429 0.4429
round diamond cut 5.00 0.5737 0.5737 0.4016 0.5737 0.5737 0.5737 0.5737
round diamond cut 6.00 1.0001 1.0001 0.7001 1.0001 1.0001 1.0001 1.0001
square normal cut 3.00 0.1988 0.1988 0.1392 0.1988 0.1988 0.1988 0.1988
square normal cut 3.50 0.3142 0.3142 0.2199 0.3142 0.3142 0.3142 0.3142
square normal cut 4.00 0.4584 0.4584 0.3208 0.4584 0.4584 0.4584 0.4584
square normal cut 4.50 0.6448 0.6448 0.4513 0.6448 0.6448 0.6448 0.6448
square normal cut 5.00 0.8549 0.8549 0.5984 0.8549 0.8549 0.8549 0.8549
square normal cut 6.00 1.4183 1.4183 0.9928 1.4183 1.4183 1.4183 1.4183
square princess cut 2.00 0.0515 0.0515 0.0361 0.0515 0.0515 0.0515 0.0515
square princess cut 2.50 0.1061 0.1061 0.0743 0.1061 0.1061 0.1061 0.1061
square princess cut 3.00 0.1679 0.1679 0.1175 0.1679 0.1679 0.1679 0.1679
square princess cut 3.50 0.2822 0.2822 0.1976 0.2822 0.2822 0.2822 0.2822
square princess cut 4.00 0.3966 0.3966 0.2776 0.3966 0.3966 0.3966 0.3966
square princess cut 4.50 0.5614 0.5614 0.3929 0.5614 0.5614 0.5614 0.5614
square princess cut 5.00 0.7540 0.7540 0.5278 0.7540 0.7540 0.7540 0.7540
square princess cut 6.00 1.3472 1.3472 0.9431 1.3472 1.3472 1.3472 1.3472
oval 4x3 0.2070 0.2070 0.1449 0.2070 0.2070 0.2070 0.2070
oval 5х3 0.2781 0.2781 0.1947 0.2781 0.2781 0.2781 0.2781
oval 5х4 0.4707 0.4707 0.3295 0.4707 0.4707 0.4707 0.4707
oval 6х4 0.5984 0.5984 0.4189 0.5984 0.5984 0.5984 0.5984
oval 6x5 0.8271 0.8271 0.5790 0.8271 0.8271 0.8271 0.8271
oval 7х5 1.0691 1.0691 0.7484 1.0691 1.0691 1.0691 1.0691
oval 8х6 1.7592 1.7592 1.2315 1.7592 1.7592 1.7592 1.7592
oval 9х7 2.5081 2.5081 1.7556 2.5081 2.5081 2.5081 2.5081
oval 10x8 3.5247 3.5247 2.4673 3.5247 3.5247 3.5247 3.5247
pear 4x3 0.1936 0.1936 0.1355 0.1936 0.1936 0.1936 0.1936
pear 5x3 0.2441 0.2441 0.1709 0.2441 0.2441 0.2441 0.2441
pear 5x4 0.4202 0.4202 0.2942 0.4202 0.4202 0.4202 0.4202
pear 6х4 0.5026 0.5026 0.3518 0.5026 0.5026 0.5026 0.5026
pear 6x5 0.7529 0.7529 0.5271 0.7529 0.7529 0.7529 0.7529
pear 7х5 0.8734 0.8734 0.6114 0.8734 0.8734 0.8734 0.8734
pear 8х6 1.4554 1.4554 1.0188 1.4554 1.4554 1.4554 1.4554
pear 9x7 2.1867 2.1867 1.5307 2.1867 2.1867 2.1867 2.1867
pear 10x8 2.9819 2.9819 2.0873 2.9819 2.9819 2.9819 2.9819
marquise 4x2 0.0917 0.0917 0.0642 0.0917 0.0917 0.0917 0.0917
marquise 5x2.5 0.1720 0.1720 0.1204 0.1720 0.1720 0.1720 0.1720
marquise 6x3 0.2894 0.2894 0.2026 0.2894 0.2894 0.2894 0.2894
marquise 7x3.5 0.4594 0.4594 0.3216 0.4594 0.4594 0.4594 0.4594
marquise 8x4 0.6602 0.6602 0.4622 0.6602 0.6602 0.6602 0.6602
marquise 10x5 1.3390 1.3390 0.9373 1.3390 1.3390 1.3390 1.3390

weight

1. A Richblu round brilliant will generally consist of 58 facets including the culet (the small area at the base of the stone’s pavilion (the lower half below the girdle)). There will be 33 facets on the crown (the top half above the middle or girdle of the stone) and 25 on the pavilion. The girdle may be frosted, smoothly polished, or faceted.

2. To generate the Richblu weight chart an average is taken of 500 pieces of newly produced blue sapphires, pink sapphires, yellow sapphires, orange sapphires, rubies and emeralds.

3. The weight value can vary no more than +/-5% of the applicable weight.