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Cushion|Lab Grown|IGI

3.10ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG624442531

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG624442531

Diamond specifications and retailer prices

From £344 GBP
HK$3,600 HKD
As of October 30, 2026
Save £1,160 GBP (77%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £1,504 GBP at Rare Carat · As of October 28, 2026
View at Rare Carat

About this 3.1ct lab-grown cushion diamond

This 3.1ct 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 LG624442531 or 624442531. Listed at 9 retailers as of October 28, 2026, with prices from £344 to £1,504, a £1,160 spread on the same certified stone. Rare Carat lists it at £1,504. 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

3.10
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG624442531
Dimensions8.48 × 8.42 × 5.64 mm
L/W Ratio1.01
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
8.48 mm8.42 mm3.10 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG624442531
Side View
Table 64.0%Crown 35.4°Girdle: MED-STKPavilion 40.3°Culet: NoneDepth 67.0%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £1,504 GBP|Low: £344 GBP|High: £3,052 GBP|Avg: £1,089 GBP
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 30, 2026
Retailer 9£344 GBP
Retailer 2£374 GBP
Retailer 6£418 GBP
Retailer 11£492 GBP
Retailer 8£543 GBP
Retailer 5£544 GBP
Retailer 12£731 GBP
Retailer 10£758 GBP
Retailer 7£1,227 GBP
Rare Carat£1,504 GBP
Retailer 4£2,724 GBP
Retailer 3£3,052 GBP

3 data points across 12 retailers

9 retailers£344 GBP to £1,504 GBP

A
Cheapest Retailer
-
£344 GBP
HK$3,600 HKD
A
Retailer 2
-
£374 GBP
View
A
Retailer 3
-
£418 GBP
$560 USD
View
B+
Retailer 4
-
£492 GBP
$659 USD
View
A
Retailer 5
-
£543 GBP
$728 USD
View
A
Retailer 6
-
£544 GBP
View
A
Retailer 7
-
£758 GBP
$1,015 USD
View
B
Retailer 8
-
£1,227 GBP
View
Most Expensive
B
Rare Carat
KI5314425KF624 · Oct 28
£1,504 GBP
$2,015 USD
View
8 more retailers have this diamond
Prices start from £344 GBPSave up to £1,160 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
3.10ct Cushion
£344 GBP