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Cushion|Lab Grown|IGI

3.13ct H SI1 Cushion Lab Grown Diamond

ID • H/SI1 • IGI LG500151347

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

Certificate IGI LG500151347

Diamond specifications and retailer prices

From £1,554 GBP
As of November 6, 2026
Save £6,752 GBP (81%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £8,306 GBP at Moon Ocean · As of November 6, 2026
View at Moon Ocean

About this 3.13ct lab-grown cushion diamond

This 3.13ct lab-grown cushion sits in the three to five carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG500151347 or 500151347. Listed at 7 retailers as of November 6, 2026, with prices from £1,554 to £8,306, a £6,752 spread on the same certified stone. Moon Ocean lists it at £8,306. 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

3.13
Carat
H
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle34.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG500151347
Dimensions8.44 × 8.05 × 5.17 mm
L/W Ratio1.05
Girdle conditionFaceted
Culet sizePointed
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
8.44 mm8.05 mm3.13 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG500151347
Side View
Table 64.0%Crown 35°Girdle: MED-VTKPavilion 34.4°Culet: NoneDepth 64.2%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £8,306 GBP|Low: £1,554 GBP|High: £12,991 GBP|Avg: £7,334 GBP|-1.6%
Moon Ocean
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 3£1,554 GBP
Retailer 6£6,303 GBP
Retailer 7£6,485 GBP
Retailer 4£6,529 GBP
Retailer 8£6,694 GBP
Retailer 5£7,561 GBP
Moon Ocean£8,306 GBP
Retailer 9£8,411 GBP
Retailer 2£12,785 GBP

40 data points across 9 retailers

7 retailers£1,554 GBP to £8,306 GBP

B+
Cheapest Retailer
-
£1,554 GBP
B
Retailer 2
-
£6,303 GBP
View
Final sale: no returns
B
Retailer 3
-
£6,485 GBP
View
Retailer 4
-
£6,529 GBP
View
Price last confirmed 25 days ago
B
Retailer 5
-
£7,561 GBP
View
Most Expensive
B
Moon Ocean
NVL-51AA9460A-347 · Nov 6
£8,306 GBP
View
5 more retailers have this diamond
Prices start from £1,554 GBPSave up to £6,752 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.

B+
3.13ct Cushion
£1,554 GBP