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Cushion|Lab Grown|IGI

3.08ct F SI1 Cushion Lab Grown Diamond

ID • F/SI1 • IGI LG653444806

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG653444806

Diamond specifications and retailer prices

From £344 GBP
As of November 6, 2026
Save £1,128 GBP (77%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £1,472 GBP at Rare Carat · As of November 1, 2026
View at Rare Carat

About this 3.08ct lab-grown cushion diamond

This 3.08ct lab-grown cushion sits in the three to five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG653444806 or 653444806. Listed at 10 retailers as of November 1, 2026, with prices from £344 to £1,472, a £1,128 spread on the same certified stone. Rare Carat lists it at £1,472. 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

3.08
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG653444806
Dimensions8.63 × 8.48 × 5.61 mm
L/W Ratio1.02
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.63 mm8.48 mm3.08 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG653444806
Side View
Table 65.0%Crown 36°Girdle: MED-STKPavilion 40.1°Culet: NoneDepth 66.2%

Caratlytics Score

How it works →
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 6
Current: £1,472 GBP|Low: £344 GBP|High: £3,743 GBP|Avg: £1,132 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
November 6, 2026
Retailer 10£344 GBP
Retailer 5£379 GBP
Retailer 8£426 GBP
Retailer 12£503 GBP
Retailer 2£505 GBP
Retailer 9£550 GBP
Retailer 6£553 GBP
Retailer 11£770 GBP
Retailer 7£1,245 GBP
Rare Carat£1,472 GBP
Retailer 3£2,903 GBP
Retailer 4£3,743 GBP

10 data points across 12 retailers

10 retailers£344 GBP to £1,472 GBP

A
Cheapest Retailer
-
£344 GBP
A
Retailer 2
-
£379 GBP
View
A
Retailer 3
-
£426 GBP
View
B+
Retailer 4
-
£503 GBP
View
A
Retailer 5
-
£505 GBP
View
A
Retailer 6
-
£550 GBP
View
A
Retailer 7
-
£553 GBP
View
A
Retailer 8
-
£770 GBP
View
B+
Retailer 9
-
£1,245 GBP
View
Most Expensive
B
Rare Carat
KI8064448KF653 · Nov 1
£1,472 GBP
$1,970 USD
View
9 more retailers have this diamond
Prices start from £344 GBPSave up to £1,128 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
3.08ct Cushion
£344 GBP