Wholesale Calibrated White Melee Lab Diamonds

Premium bulk white melee lab diamonds (D-F color, VVS-VS clarity). Strictly calibrated (+/-0.05mm) full-cut round brilliants for seamless jewelry manufacturing & CNC settings. Request a B2B quote or sample parcel today!

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Wholesale Calibrated White Melee Lab Diamonds

Why Source White Melee Lab Grown Diamonds From Us?

+/- 0.05mm Strict Tolerances

Eliminate production downtime. Our automated sieve calibration ensures perfectly identical millimeter sizing, reducing setting labor costs by up to 30% for volume casting.

100% CVD/HPHT Purity Guarantee

Zero contamination. Every batch goes through rigorous optical screening instruments to ensure absolute pure lab-grown authenticity – guaranteeing 0% mined diamond mix-ins.

No Blue No Milk

Our technological control guarantees no blue nuance or milky appearance in our D-F colorless ranges.

Scale-Stable Monthly Capacity

As a primary factory partner, we maintain over 5,000 carats of continuous rolling stock in calibrated sizes, securing your jewelry brand’s peak-season scalability.

White Melee Lab Diamonds Available Size Table

Round cut melee lab diamonds size chart
Average Diameter (mm)Carat Weight (ct)
0.70 – 0.800.003
0.80 – 0.900.003
0.90 – 1.000.004
1.00 – 1.100.005
1.10 – 1.150.006
1.15 – 1.200.007
1.20 – 1.250.008
1.25 – 1.300.009
1.30 – 1.350.01
1.35 – 1.400.011
1.40 – 1.450.012
1.45 – 1.500.013
1.50 – 1.550.014
1.55 – 1.600.015
1.60 – 1.700.018
1.70 – 1.800.021
1.80 – 1.900.025
1.90 – 2.000.03
2.00 – 2.100.035
2.10 – 2.200.04
2.20 – 2.300.045
2.30 – 2.400.05
2.40 – 2.500.06
2.50 – 2.600.065
2.60 – 2.700.07
2.70 – 2.800.08
2.80 – 2.900.09
2.90 – 3.000.10
3.00 – 3.100.11
3.10 – 3.200.12
3.20 – 3.300.13
3.30 – 3.400.14
3.40 – 3.500.15
3.50 – 3.600.16
3.60 – 3.700.17
3.70 – 3.800.18
3.80 – 3.900.19
3.90 – 4.000.20
4.00 – 4.100.22
4.10 – 4.300.23 – 0.29
4.30 – 4.400.30 – 0.34
4.40 – 4.900.34 – 0.49
5.00 – 5.600.50 – 0.59
Oval cut melee lab diamonds size chart
Average Diameter (mm)Carat Weight (ct)
2.00×3.000.05
2.50×3.000.08
2.50×3.500.09
2.60×3.700.10
3.00×4.000.15
3.00×4.500.17
3.00×5.000.18
3.20×4.800.20
3.35×4.700.20
3.50×5.000.25
3.80×5.300.30
4.00×5.600.35
4.00×6.000.40
4.50×6.300.50
5.05×7.050.70
5.70×8.001.00
6.00×8.001.20
Princess cut melee lab diamonds size chart
Average Diameter (mm)Carat Weight (ct)
2.00×2.000.06
2.50×2.500.10
2.80×2.800.15
3.05×3.050.18
3.15×3.150.21
3.30×3.300.25
3.55×3.550.30
3.75×3.750.35
4.05×4.050.45
4.25×4.250.50
4.50×4.500.60
4.70×4.700.70
5.00×5.000.85
5.30×5.301.00
5.50×5.501.15
6.00×6.001.50
Pear cut melee lab diamonds size chart
Average Diameter (mm)Carat Weight (ct)
1.50×2.500.03
2.00×3.000.05
2.00×3.500.06
2.50×3.500.08
2.55×4.050.10
2.50×4.500.12
3.00×4.000.14
3.00×4.500.15
3.00×5.000.17
3.20×4.800.18
3.30×5.000.20
3.50×5.000.22
3.55×5.050.25
3.50×5.500.25
3.75×5.750.30
3.80×5.500.30
3.80×6.000.32
4.00×6.000.37
4.20×6.300.40
4.50×6.500.48
4.50×6.800.50
4.50×7.000.54
5.05×7.050.65
5.05×7.550.70
5.05×8.050.75
5.70×8.501.00
7.00×9.001.70
Radiant cut melee lab diamonds size chart
Average Diameter (mm)Carat Weight (ct)
2.00×3.000.07
2.30×3.100.10
3.00×4.000.20
3.20×4.100.25
3.35×4.700.30
3.50×4.500.32
4.00×5.500.50
4.30×6.000.65
5.00×7.001.00
Marquise cut melee lab diamonds size chart
Average Diameter (mm)Carat Weight (ct)
1.50×3.000.03
1.75×3.500.04
2.00×3.500.05
2.00×4.000.06
2.50×4.500.10
2.50×5.000.11
2.80×5.500.15
3.00×6.000.20
3.30×6.500.25
3.50×7.000.30
4.00×8.000.45
4.20×8.200.50
4.65×9.300.70
5.25×10.501.00
Heart cut melee lab diamonds size chart
Average Diameter (mm)Carat Weight (ct)
3.00×3.000.10
3.00×3.300.11
3.50×3.500.18
3.80×4.200.22
4.00×4.400.27
4.20×4.600.30
4.50×5.000.38
5.00×5.500.50
5.60×6.100.70
6.00×6.000.77
6.40×6.901.00
Asscher cut melee lab diamonds size chart
Average Diameter (mm)Carat Weight (ct)
3.00×3.000.17
3.15×3.150.20
3.50×3.500.27
3.70×3.700.30
4.35×4.350.50
5.45×5.451.00
Emerald cut melee lab diamonds size chart
Average Diameter (mm)Carat Weight (ct)
2.00×3.000.08
2.30×3.100.10
2.55×3.550.15
2.50×4.000.17
2.80×4.000.20
3.00×4.000.25
3.00×4.250.26
3.00×4.500.30
3.00×5.000.32
3.20×4.500.33
3.35×4.800.35
3.50×5.000.40
3.80×5.400.50
4.00×6.000.65
4.05×6.050.70
4.45×6.300.80
4.75×6.751.00
5.00×7.001.15
6.00×8.001.85
Cushion cut melee lab diamonds size chart
Average Diameter (mm)Carat Weight (ct)
3.05×3.050.15
3.50×3.500.23
3.70×3.700.27
3.90×3.900.30
4.00×4.000.33
4.65×4.650.50
5.15×5.150.70
5.80×5.801.00
Tap Baguette cut melee lab diamonds size chart
Average Diameter (mm)Carat Weight (ct)
3.00×2.00×1.500.07
4.00×2.00×1.500.09
4.50×2.50×1.500.14
4.50×2.50×1.700.14
4.00×3.00×2.000.19
4.50×3.00×2.000.19
4.00×3.50×2.500.26
5.00×3.00×2.000.24
6.00×3.00×2.000.27
7.00×4.00×3.000.75
Baguette cut melee lab diamonds size chart
Average Diameter (mm)Carat Weight (ct)
1.50×2.500.04
1.50×3.000.05
2.00×3.500.10
2.00×4.000.11
2.00×4.500.12
2.50×4.000.17
2.50×4.500.19
2.50×5.000.21
3.00×5.000.30
Are your white melee parcels single-cut or full-cut?

We exclusively supply Full-Cut round brilliant diamonds featuring a precise layout of 57 to 58 facets. This ensures maximum fire, sparkle, and uniformity across micro-settings, outperforming traditional single-cut alternatives.

What is the precise size sorting tolerance for micro-pave casting?

Our highly calibrated melee diamonds are sorted through microscopic laser-cut sieves, narrowing size deviation to +/- 0.02mm. This means a 1.5mm order will not arrive with erratic 1.4mm or 1.6mm stones, allowing seamless drop-in placement for automatic CNC settings.

Can these white lab diamonds withstand extreme torch heat and casting-in-place?

Yes. Our melee stones are grown from high-purity crystalline structures capable of surviving standard commercial wax-setting and vacuum investment casting-in-place processes without experiencing frostiness, clouding, or color shifts.

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