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Cushion|Lab Grown|IGI

3.09ct G VS1 Cushion Lab Grown Diamond

EX • G/VS1 • IGI LG729555669

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

Certificate IGI LG729555669

Diamond specifications and retailer prices

From £847 GBP
$1,136 USD
As of November 3, 2026
Save £2,769 GBP (77%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £3,616 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 LG729555669 or 729555669. Listed at 13 retailers as of November 3, 2026, with prices from £847 to £3,616, a £2,769 spread on the same certified stone. Brilliant Earth lists it at £3,616. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle40°
OriginLab Grown
Grading LabIGI
CertificateIGI LG729555669
Dimensions8.62 × 8.36 × 5.61 mm
L/W Ratio1.03
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.62 mm8.36 mm3.09 ctG / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG729555669
Side View
Table 65.0%Crown 34.9°Girdle: MED-THKPavilion 40°Culet: NoneDepth 67.1%

Caratlytics Score

How it works →
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 3
Current: £3,616 GBP|Low: £356 GBP|High: £3,825 GBP|Avg: £1,518 GBP|-5.5%
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
November 3, 2026
Retailer 14£499 GBP
Retailer 5£847 GBP
Retailer 13£848 GBP
Retailer 11£850 GBP
Retailer 2£864 GBP
Retailer 9£918 GBP
Retailer 10£1,166 GBP
Retailer 8£1,198 GBP
Retailer 4£1,602 GBP
Retailer 12£1,761 GBP
Retailer 3£1,773 GBP
Retailer 6£2,134 GBP
Retailer 7£2,397 GBP
Brilliant Earth£3,616 GBP

43 data points across 14 retailers

13 retailers£847 GBP to £3,616 GBP

A
Cheapest Retailer
-
£847 GBP
$1,136 USD
A
Retailer 2
-
£848 GBP
$1,137 USD
View
A
Retailer 3
-
£850 GBP
$1,140 USD
View
A
Retailer 4
-
£864 GBP
View
A
Retailer 5
-
£918 GBP
€1,173 EUR
View
B+
Retailer 6
-
£1,166 GBP
A$2,406 AUD
View
A
Retailer 7
-
£1,198 GBP
ZAR 25,965 ZAR
View
Retailer 8
-
£1,602 GBP
View
Price last confirmed 15 days ago
B+
Retailer 9
-
£1,761 GBP
$2,362 USD
View
B+
Retailer 10
-
£1,773 GBP
SGD 3,214 SGD
View
B
Retailer 11
-
£2,134 GBP
$2,862 USD
View
B
Retailer 12
-
£2,397 GBP
View
Most Expensive
B
Brilliant Earth
15885426A · Nov 3
£3,616 GBP
$4,850 USD
View
12 more retailers have this diamond
Prices start from £847 GBPSave up to £2,769 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
£847 GBP