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Cushion|Lab Grown|IGI

3.06ct F SI1 Cushion Lab Grown Diamond

ID • F/SI1 • IGI LG522237342

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG522237342

Diamond specifications and retailer prices

From £471 GBP
As of November 6, 2026
Save £1,852 GBP (80%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £2,324 GBP at Brilliant Earth · As of November 6, 2026
View at Brilliant Earth

About this 3.06ct lab-grown cushion diamond

This 3.06ct 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 LG522237342 or 522237342. Listed at 9 retailers as of November 6, 2026, with prices from £471 to £2,324, a £1,852 spread on the same certified stone. Brilliant Earth lists it at £2,324. 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

3.06
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.3°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG522237342
Dimensions8.50 × 8.34 × 5.57 mm
L/W Ratio1.02
Girdle conditionFaceted
Culet sizePointed
Top View
8.50 mm8.34 mm3.06 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG522237342
Side View
Table 63.5%Crown 35.3°Girdle: STK-VTKPavilion 41.1°Culet: NoneDepth 66.8%

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 6
Current: £2,324 GBP|Low: £448 GBP|High: £2,555 GBP|Avg: £1,103 GBP|-9.1%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 5, 2026
Retailer 8£471 GBP
Retailer 6£522 GBP
Retailer 3£620 GBP
Retailer 7£729 GBP
Retailer 5£805 GBP
Retailer 2£807 GBP
Retailer 4£2,267 GBP
Brilliant Earth£2,324 GBP

43 data points across 8 retailers

9 retailers£471 GBP to £2,324 GBP

A
Cheapest Retailer
-
£471 GBP
Final sale: no returns
Retailer 2
-
£522 GBP
View
Price last confirmed 21 days ago
A
Retailer 3
-
£620 GBP
View
A
Retailer 4
-
£729 GBP
View
A
Retailer 5
-
£805 GBP
View
A
Retailer 6
-
£807 GBP
View
B
Retailer 7
-
£1,644 GBP
View
B
Retailer 8
-
£2,267 GBP
View
Most Expensive
B
Brilliant Earth
17972593A · Nov 6
£2,324 GBP
$3,110 USD
View
8 more retailers have this diamond
Prices start from £471 GBPSave up to £1,852 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
3.06ct Cushion
£471 GBP