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Cushion|Lab Grown|IGI

3.09ct G VS1 Cushion Lab Grown Diamond

ID • G/VS1 • IGI LG776656912

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

Certificate IGI LG776656912

Diamond specifications and retailer prices

From £614 GBP
As of November 2, 2026
Save £1,782 GBP (74%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £3,616 GBP at Brilliant Earth · As of October 26, 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 LG776656912 or 776656912. Listed at 15 retailers as of November 2, 2026, with a 290% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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 angle34.7°
Pavilion angle39.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG776656912
Dimensions8.73 × 8.42 × 5.49 mm
L/W Ratio1.04
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.73 mm8.42 mm3.09 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG776656912
Side View
Table 61.0%Crown 34.7°Girdle: MED-STKPavilion 39.4°Culet: NoneDepth 65.2%

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 2
Current: £3,616 GBP|Low: £614 GBP|High: £3,825 GBP|Avg: £1,549 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
Retailer 15
November 3, 2026
Retailer 9£614 GBP
Retailer 5£847 GBP
Retailer 15£848 GBP
Retailer 13£850 GBP
Retailer 2£864 GBP
Retailer 11£918 GBP
Retailer 7£948 GBP
Retailer 12£1,166 GBP
Retailer 8£1,198 GBP
Retailer 4£1,602 GBP
Retailer 14£1,761 GBP
Retailer 3£1,773 GBP
Retailer 6£2,134 GBP
Retailer 10£2,397 GBP
Brilliant Earth£3,616 GBP

42 data points across 15 retailers

15 retailers£614 GBP to £2,397 GBP

A
Cheapest Retailer
-
£614 GBP
A
Retailer 2
-
£847 GBP
$1,136 USD
View
A
Retailer 3
-
£848 GBP
$1,137 USD
View
A
Retailer 4
-
£850 GBP
$1,140 USD
View
A
Retailer 5
-
£864 GBP
View
A
Retailer 6
-
£918 GBP
€1,173 EUR
View
A
Retailer 7
-
£1,166 GBP
A$2,406 AUD
View
A
Retailer 8
-
£1,198 GBP
ZAR 25,965 ZAR
View
B+
Retailer 9
-
£1,551 GBP
$2,080 USD
View
Retailer 10
-
£1,602 GBP
View
Price last confirmed 19 days ago
B+
Retailer 11
-
£1,761 GBP
$2,362 USD
View
B+
Retailer 12
-
£1,773 GBP
SGD 3,214 SGD
View
B
Retailer 13
-
£2,134 GBP
$2,862 USD
View
B
Retailer 14
-
£2,397 GBP
View
Most Expensive
Brilliant Earth
18233605A · Oct 26
£3,616 GBP
$4,850 USD
View
Price last confirmed 8 days ago
14 more retailers have this diamond
Prices start from £614 GBPSave up to £1,782 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
£614 GBP