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Cushion|Lab Grown|IGI

4.12ct F SI1 Cushion Lab Grown Diamond

ID • F/SI1 • IGI LG602314691

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG602314691

Diamond specifications and retailer prices

From £518 GBP
$695 USD
As of November 2, 2026
Save £1,874 GBP (78%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £2,392 GBP at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 4.12ct lab-grown cushion diamond

This 4.12ct 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 LG602314691 or 602314691. Listed at 9 retailers as of November 2, 2026, with prices from £518 to £2,392, a £1,874 spread on the same certified stone. Brilliant Earth lists it at £2,392. 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

4.12
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.1°
Pavilion angle39.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG602314691
Dimensions10.79 × 8.58 × 5.73 mm
L/W Ratio1.26
Girdle conditionFaceted
Culet sizePointed
Top View
10.79 mm8.58 mm4.12 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG602314691
Side View
Table 66.0%Crown 31.1°Girdle: MED-THKPavilion 39.8°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 2
Current: £2,392 GBP|Low: £356 GBP|High: £4,516 GBP|Avg: £1,102 GBP|-47.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 7£356 GBP
Retailer 4£518 GBP
Retailer 9£644 GBP
Retailer 3£667 GBP
Retailer 2£673 GBP
Retailer 8£721 GBP
Retailer 6£879 GBP
Retailer 5£1,516 GBP
Brilliant Earth£2,392 GBP

36 data points across 9 retailers

9 retailers£518 GBP to £2,392 GBP

Retailer 1
-
£356 GBP
Price last confirmed 16 days ago
A
Retailer 2
-
£518 GBP
$695 USD
View
B+
Retailer 3
-
£644 GBP
$864 USD
View
A
Retailer 4
-
£667 GBP
€852 EUR
View
A
Retailer 5
-
£673 GBP
View
A
Retailer 6
-
£721 GBP
$968 USD
View
A
Retailer 7
-
£879 GBP
$1,179 USD
View
B+
Retailer 8
-
£1,516 GBP
View
Most Expensive
B
Brilliant Earth
8384918A · Nov 2
£2,392 GBP
$3,210 USD
View
8 more retailers have this diamond
Prices start from £518 GBPSave up to £1,874 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
4.12ct Cushion
£518 GBP