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Cushion|Lab Grown|IGI

3.21ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG625441166

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG625441166

Diamond specifications and retailer prices

From £459 GBP
$615 USD
As of October 29, 2026
Save £1,673 GBP (78%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £2,132 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 3.21ct lab-grown cushion diamond

This 3.21ct lab-grown cushion sits in the three to five carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG625441166 or 625441166. Listed at 11 retailers as of October 29, 2026, with prices from £459 to £2,132, a £1,673 spread on the same certified stone. MOH London lists it at £2,132. 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

3.21
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishVery Good
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle35.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG625441166
Dimensions10.21 × 7.71 × 5.06 mm
L/W Ratio1.32
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
10.21 mm7.71 mm3.21 ctE / SI1
OriginLab Grown
CutIdeal
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateIGI LG625441166
Side View
Table 64.0%Crown 34.1°Girdle: MED-STKPavilion 35.8°Culet: NoneDepth 65.6%

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 29
Current: £2,132 GBP|Low: £296 GBP|High: £3,694 GBP|Avg: £1,274 GBP|-0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 31, 2026
Retailer 11£459 GBP
Retailer 10£508 GBP
Retailer 5£549 GBP
Retailer 8£681 GBP
Retailer 9£775 GBP
Retailer 2£792 GBP
Retailer 12£861 GBP
Retailer 7£1,108 GBP
Retailer 3£1,648 GBP
Retailer 6£1,918 GBP
MOH London£2,132 GBP
Retailer 4£3,694 GBP

42 data points across 12 retailers

11 retailers£459 GBP to £2,132 GBP

A
Cheapest Retailer
-
£459 GBP
$615 USD
Final sale: no returns
Retailer 2
-
£508 GBP
$681 USD
View
Price last confirmed 15 days ago
A
Retailer 3
-
£549 GBP
$735 USD
View
B+
Retailer 4
-
£681 GBP
$912 USD
View
A
Retailer 5
-
£792 GBP
View
B+
Retailer 6
-
£861 GBP
$1,154 USD
View
B+
Retailer 7
-
£1,108 GBP
$1,485 USD
View
B
Retailer 8
-
£1,648 GBP
$2,208 USD
View
Retailer 9
-
£1,918 GBP
$2,570 USD
View
Price last confirmed 12 days ago
Retailer 10
-
£2,128 GBP
$2,851 USD
View
Price last confirmed 88 days ago
Most Expensive
B
MOH London
LG625441166 · Oct 29
£2,132 GBP
View
10 more retailers have this diamond
Prices start from £459 GBPSave up to £1,673 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
3.21ct Cushion
£459 GBP