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Cushion|Lab Grown|IGI

3.09ct G VS1 Cushion Lab Grown Diamond

ID • G/VS1 • IGI LG828654239

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG828654239

Diamond specifications and retailer prices

From £404 GBP
As of November 2, 2026
Save £1,647 GBP (80%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £2,051 GBP at Brilliant Earth · As of November 3, 2026
View at Brilliant Earth

About this 3.09ct lab-grown cushion diamond

This 3.09ct lab-grown cushion sits in the three to five carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG828654239 or 828654239. Listed at 15 retailers as of November 2, 2026, with prices from £404 to £2,051, a £1,647 spread on the same certified stone. Brilliant Earth lists it at £2,051. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

3.09
Carat
G
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.1°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG828654239
Dimensions9.16 × 8.85 × 5.46 mm
L/W Ratio1.04
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.16 mm8.85 mm3.09 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG828654239
Side View
Table 66.0%Crown 35.1°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 61.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: £2,051 GBP|Low: £375 GBP|High: £2,051 GBP|Avg: £963 GBP
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 3, 2026
Retailer 6£375 GBP
Retailer 9£404 GBP
Retailer 3£474 GBP
Retailer 13£486 GBP
Retailer 11£592 GBP
Retailer 2£595 GBP
Retailer 4£763 GBP
Retailer 8£790 GBP
Retailer 14£794 GBP
Retailer 15£1,193 GBP
Retailer 12£1,268 GBP
Retailer 10£1,417 GBP
Retailer 7£1,500 GBP
Retailer 5£1,566 GBP
Brilliant Earth£2,051 GBP

28 data points across 15 retailers

15 retailers£404 GBP to £2,051 GBP

Retailer 1
-
£375 GBP
$503 USD
Price last confirmed 9 days ago
A
Retailer 2
-
£404 GBP
View
A
Retailer 3
-
£474 GBP
$635 USD
View
B+
Retailer 4
-
£486 GBP
$652 USD
View
A
Retailer 5
-
£592 GBP
€756 EUR
View
A
Retailer 6
-
£595 GBP
View
A
Retailer 7
-
£763 GBP
A$1,575 AUD
View
A
Retailer 8
-
£790 GBP
ZAR 17,113 ZAR
View
A
Retailer 9
-
£794 GBP
$1,065 USD
View
B+
Retailer 10
-
£1,193 GBP
$1,600 USD
View
B+
Retailer 11
-
£1,268 GBP
$1,701 USD
View
B+
Retailer 12
-
£1,417 GBP
View
Retailer 13
-
£1,500 GBP
SGD 2,719 SGD
View
Price last confirmed 26 days ago
B+
Retailer 14
-
£1,566 GBP
$2,100 USD
View
Most Expensive
B
Brilliant Earth
21721451A · Nov 3
£2,051 GBP
$2,750 USD
View
14 more retailers have this diamond
Prices start from £404 GBPSave up to £1,647 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
3.09ct Cushion
£404 GBP