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Cushion|Lab Grown|IGI

3.14ct H SI1 Cushion Lab Grown Diamond

EX • H/SI1 • IGI LG576318561

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG576318561

Diamond specifications and retailer prices

From £259 GBP
As of November 6, 2026
Save £894 GBP (78%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £1,153 GBP at Reve Diamonds · As of November 6, 2026
View at Reve Diamonds

About this 3.14ct lab-grown cushion diamond

This 3.14ct 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 LG576318561 or 576318561. Listed at 10 retailers as of November 6, 2026, with prices from £259 to £1,153, a £894 spread on the same certified stone. Reve Diamonds lists it at £1,153. 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

3.14
Carat
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.1°
Pavilion angle31.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG576318561
Dimensions8.27 × 8.13 × 5.22 mm
L/W Ratio1.02
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
8.27 mm8.13 mm3.14 ctH / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG576318561
Side View
Table 61.0%Crown 35.1°Girdle: MED-THKPavilion 31.6°Culet: NoneDepth 64.2%

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: £341 GBP|Low: £259 GBP|High: £1,163 GBP|Avg: £657 GBP|-1.9%
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 8£259 GBP
Retailer 6£287 GBP
Retailer 7£315 GBP
Retailer 1£341 GBP
Retailer 3£403 GBP
Retailer 5£415 GBP
Retailer 9£819 GBP
Retailer 10£956 GBP
Retailer 2£1,056 GBP
Retailer 4£1,148 GBP
Reve Diamonds£1,153 GBP

30 data points across 11 retailers

10 retailers£259 GBP to £1,153 GBP

A
Cheapest Retailer
-
£259 GBP
Final sale: no returns
Retailer 2
-
£287 GBP
View
Price last confirmed 25 days ago
A
Retailer 3
-
£315 GBP
View
A
Retailer 4
-
£341 GBP
View
A
Retailer 5
-
£403 GBP
View
B+
Retailer 6
-
£415 GBP
View
B+
Retailer 7
-
£819 GBP
View
B+
Retailer 8
-
£956 GBP
View
B+
Retailer 9
-
£1,148 GBP
View
Most Expensive
B+
Reve Diamonds
6086EB15D · Nov 6
£1,153 GBP
$1,543 USD
View
9 more retailers have this diamond
Prices start from £259 GBPSave up to £894 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
3.14ct Cushion
£259 GBP