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Cushion|Lab Grown|IGI

3.12ct F SI1 Cushion Lab Grown Diamond

ID • F/SI1 • IGI LG537238304

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG537238304

Diamond specifications and retailer prices

From £649 GBP
As of November 6, 2026
Save £3,004 GBP (82%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £3,653 GBP at Do Amore Diamonds · As of November 6, 2026
View at Do Amore Diamonds

About this 3.12ct lab-grown cushion diamond

This 3.12ct 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 LG537238304 or 537238304. Listed at 12 retailers as of November 6, 2026, with prices from £649 to £3,653, a £3,004 spread on the same certified stone. Do Amore Diamonds lists it at £3,653. 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

3.12
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG537238304
Dimensions8.32 × 8.23 × 5.76 mm
L/W Ratio1.01
Girdle conditionFaceted
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
8.32 mm8.23 mm3.12 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG537238304
Side View
Table 63.5%Crown 35.5°Girdle: MED-THKPavilion 40.6°Culet: NoneDepth 70.0%

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: £3,653 GBP|Low: £504 GBP|High: £3,653 GBP|Avg: £1,318 GBP|+29.0%
Do Amore Diamonds
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 9£649 GBP
Retailer 7£650 GBP
Retailer 2£684 GBP
Retailer 10£776 GBP
Retailer 11£787 GBP
Retailer 5£872 GBP
Retailer 3£1,155 GBP
Retailer 8£1,483 GBP
Retailer 12£1,906 GBP
Retailer 4£1,921 GBP
Retailer 6£2,436 GBP
Do Amore Diamonds£3,653 GBP

36 data points across 12 retailers

12 retailers£649 GBP to £3,653 GBP

A
Cheapest Retailer
-
£649 GBP
A
Retailer 2
-
£650 GBP
View
A
Retailer 3
-
£684 GBP
View
A
Retailer 4
-
£776 GBP
View
B+
Retailer 5
-
£787 GBP
View
B+
Retailer 6
-
£872 GBP
View
B+
Retailer 7
-
£1,155 GBP
View
B+
Retailer 8
-
£1,483 GBP
View
B
Retailer 9
-
£1,906 GBP
View
B
Retailer 10
-
£1,921 GBP
View
B
Retailer 11
-
£2,436 GBP
View
Most Expensive
B
Do Amore Diamonds
27-18523B7C3 · Nov 6
£3,653 GBP
$4,890 USD
View
11 more retailers have this diamond
Prices start from £649 GBPSave up to £3,004 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
3.12ct Cushion
£649 GBP