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Cushion|Lab Grown|IGI

3.51ct H SI1 Cushion Lab Grown Diamond

ID • H/SI1 • IGI LG788640233

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG788640233

Diamond specifications and retailer prices

From €617 EUR
$689 USD
As of November 1, 2026
Save €2,353 EUR (79%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: €2,969 EUR at MOH London · As of November 1, 2026
View at MOH London

About this 3.51ct lab-grown cushion diamond

This 3.51ct lab-grown cushion sits in the three to five carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG788640233 or 788640233. Listed at 10 retailers as of November 1, 2026, with prices from €617 to €2,969, a €2,353 spread on the same certified stone. MOH London lists it at €2,969. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

3.51
Carat
H
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.3°
Pavilion angle37.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG788640233
Dimensions11.23 × 7.91 × 4.82 mm
L/W Ratio1.42
Girdle conditionFaceted
Culet sizeLarge
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.23 mm7.91 mm3.51 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG788640233
Side View
Table 63.0%Crown 33.3°Girdle: THK-VTKPavilion 37.9°Culet: LargeDepth 60.9%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: €2,969 EUR|Low: €617 EUR|High: €3,795 EUR|Avg: €1,457 EUR|+0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 9€617 EUR
Retailer 7€684 EUR
Retailer 3€788 EUR
Retailer 8€917 EUR
Retailer 6€1,009 EUR
Retailer 2€1,039 EUR
Retailer 5€1,354 EUR
Retailer 4€2,086 EUR
Retailer 10€2,210 EUR
MOH London€2,969 EUR

27 data points across 10 retailers

10 retailers€617 EUR to €2,969 EUR

A
Cheapest Retailer
-
€617 EUR
$689 USD
Final sale: no returns
Retailer 2
-
€684 EUR
$764 USD
View
Price last confirmed 16 days ago
A
Retailer 3
-
€788 EUR
$880 USD
View
B+
Retailer 4
-
€917 EUR
$1,025 USD
View
A
Retailer 5
-
€1,009 EUR
$1,127 USD
View
A
Retailer 6
-
€1,039 EUR
View
B+
Retailer 7
-
€1,354 EUR
$1,513 USD
View
B
Retailer 8
-
€2,086 EUR
$2,330 USD
View
B+
Retailer 9
-
€2,210 EUR
$2,469 USD
View
Most Expensive
B
MOH London
LG788640233 · Nov 1
€2,969 EUR
£2,612 GBP
View
9 more retailers have this diamond
Prices start from €617 EURSave up to €2,353 EUR

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
3.51ct Cushion
€617 EUR