CaratHunter
Plans
Cushion|Lab Grown|IGI

4.01ct H SI1 Cushion Lab Grown Diamond

ID • H/SI1 • IGI LG522235501

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG522235501

Diamond specifications and retailer prices

From £1,987 GBP
As of November 6, 2026
Save £9,829 GBP (83%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £24,406 GBP at Reve Diamonds · As of November 6, 2026
View at Reve Diamonds

About this 4.01ct lab-grown cushion diamond

This 4.01ct 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 LG522235501 or 522235501. Listed at 8 retailers as of November 6, 2026, with a 495% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

4.01
Carat
H
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.2°
Pavilion angle31.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG522235501
Dimensions8.85 × 8.83 × 5.49 mm
L/W Ratio1.00
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
8.85 mm8.83 mm4.01 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG522235501
Side View
Table 65.5%Crown 32.2°Girdle: STK-VTKPavilion 31.5°Culet: NoneDepth 62.2%

Caratlytics Score

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

Price History

Last verified: Nov 6
Current: £11,816 GBP|Low: £1,987 GBP|High: £24,406 GBP|Avg: £10,980 GBP|-1.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Reve Diamonds
November 6, 2026
Retailer 4£1,987 GBP
Retailer 2£7,407 GBP
Retailer 8£9,021 GBP
Retailer 7£9,451 GBP
Retailer 5£9,789 GBP
Retailer 9£9,797 GBP
Retailer 6£10,443 GBP
Retailer 10£10,510 GBP
Retailer 1£11,816 GBP
Retailer 3£14,986 GBP
Reve Diamonds£24,406 GBP

26 data points across 11 retailers

8 retailers£1,987 GBP to £11,816 GBP

B+
Cheapest Retailer
-
£1,987 GBP
B
Retailer 2
-
£9,021 GBP
View
B
Retailer 3
-
£9,451 GBP
View
Final sale: no returns
Retailer 4
-
£9,789 GBP
View
Price last confirmed 26 days ago
B
Retailer 5
-
£10,443 GBP
View
B
Retailer 6
-
£11,816 GBP
View
Retailer 7
-
£14,986 GBP
View
Price under review
Most Expensive
Reve Diamonds
0DA9C643F · Nov 6
£24,406 GBP
$32,668 USD
View
Price under review
7 more retailers have this diamond
Prices start from £1,987 GBPSave up to £9,829 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+
4.01ct Cushion
£1,987 GBP