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Cushion|Lab Grown|IGI

5.05ct F SI1 Cushion Lab Grown Diamond

ID • F/SI1 • IGI LG838637523

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG838637523

Diamond specifications and retailer prices

From £526 GBP
$706 USD
As of November 1, 2026
Save £3,952 GBP (88%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £4,479 GBP at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 5.05ct lab-grown cushion diamond

This 5.05ct lab-grown cushion sits in the over five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG838637523 or 838637523. Listed at 11 retailers as of November 1, 2026, with prices from £526 to £4,479, a £3,952 spread on the same certified stone. Brilliant Earth lists it at £4,479. 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

5.05
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.1°
Pavilion angle37.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG838637523
Dimensions10.06 × 9.83 × 6.45 mm
L/W Ratio1.02
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.06 mm9.83 mm5.05 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG838637523
Side View
Table 63.0%Crown 36.1°Girdle: MED-THKPavilion 37.5°Culet: NoneDepth 65.6%

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: Nov 1
Current: £4,479 GBP|Low: £526 GBP|High: £5,544 GBP|Avg: £1,738 GBP|-19.2%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 9£526 GBP
Retailer 4£609 GBP
Retailer 7£633 GBP
Retailer 3£698 GBP
Retailer 5£905 GBP
Retailer 2£951 GBP
Retailer 10£989 GBP
Retailer 8£1,189 GBP
Retailer 11£1,880 GBP
Retailer 6£2,295 GBP
Brilliant Earth£4,479 GBP

30 data points across 11 retailers

11 retailers£526 GBP to £4,479 GBP

A
Cheapest Retailer
-
£526 GBP
$706 USD
Final sale: no returns
A
Retailer 2
-
£609 GBP
View
A
Retailer 3
-
£633 GBP
$850 USD
View
B+
Retailer 4
-
£698 GBP
$937 USD
View
B+
Retailer 5
-
£905 GBP
View
B+
Retailer 6
-
£951 GBP
€1,216 EUR
View
B+
Retailer 7
-
£989 GBP
$1,327 USD
View
B+
Retailer 8
-
£1,189 GBP
$1,596 USD
View
B
Retailer 9
-
£1,880 GBP
$2,523 USD
View
B
Retailer 10
-
£2,295 GBP
View
Most Expensive
B
Brilliant Earth
21684254A · Nov 2
£4,479 GBP
$6,010 USD
View
10 more retailers have this diamond
Prices start from £526 GBPSave up to £3,952 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
5.05ct Cushion
£526 GBP