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Cushion|Lab Grown|IGI

3.51ct H VS2 Cushion Lab Grown Diamond

VG • H/VS2 • IGI LG583397426

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG583397426

Diamond specifications and retailer prices

From £334 GBP
$448 USD
As of October 31, 2026
Save £259 GBP (44%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £1,424 GBP at Rare Carat · As of September 9, 2026
View at Rare Carat

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 VS2 clarity (very-slightly-included), with a very-good cut grade and certified by IGI LG583397426 or 583397426. Listed at 4 retailers as of October 30, 2026, with a 77% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

3.51
Carat
H
Colour
VS2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.1°
Pavilion angle35.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG583397426
Dimensions9.09 × 8.66 × 5.23 mm
L/W Ratio1.05
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
9.09 mm8.66 mm3.51 ctH / VS2
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG583397426
Side View
Table 73.0%Crown 37.1°Girdle: MED-STKPavilion 35.8°Culet: NoneDepth 60.4%

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: Oct 31
Current: £1,424 GBP|Low: £334 GBP|High: £2,552 GBP|Avg: £1,058 GBP
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 26, 2026
Retailer 4£334 GBP
Retailer 5£478 GBP
Retailer 2£531 GBP
Retailer 3£593 GBP
Retailer 9£652 GBP
Retailer 6£1,379 GBP
Rare Carat£1,424 GBP
Retailer 8£1,570 GBP
Retailer 7£2,552 GBP

2 data points across 9 retailers

4 retailers£334 GBP to £593 GBP

A
Cheapest Retailer
-
£334 GBP
$448 USD
Final sale: no returns
B+
Retailer 2
-
£531 GBP
$712 USD
View
B+
Retailer 3
-
£593 GBP
$795 USD
View
Most Expensive
Rare Carat
56106A_l_583397426 · Sep 9
£1,424 GBP
$1,908 USD
View
Price last confirmed 52 days ago
3 more retailers have this diamond
Prices start from £334 GBPSave up to £259 GBP

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
£334 GBP