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Cushion|Lab Grown|IGI

3.09ct D VS1 Cushion Lab Grown Diamond

ID • D/VS1 • IGI LG784639101

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

Certificate IGI LG784639101

Diamond specifications and retailer prices

From £393 GBP
$526 USD
As of October 31, 2026
Save £4,466 GBP (92%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £4,859 GBP at Brilliant Earth · As of October 31, 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 D colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG784639101 or 784639101. Listed at 17 retailers as of October 31, 2026, with prices from £393 to £4,859, a £4,466 spread on the same certified stone. Brilliant Earth lists it at £4,859. 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
D
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.2°
Pavilion angle39.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG784639101
Dimensions8.52 × 8.38 × 5.57 mm
L/W Ratio1.02
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.52 mm8.38 mm3.09 ctD / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG784639101
Side View
Table 63.0%Crown 36.2°Girdle: MED-THKPavilion 39.3°Culet: NoneDepth 66.5%

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: Oct 31
Current: £4,859 GBP|Low: £393 GBP|High: £5,008 GBP|Avg: £1,326 GBP|-3.0%
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
Retailer 16
Retailer 17
Retailer 18
November 1, 2026
Retailer 7£393 GBP
Retailer 16£436 GBP
Retailer 17£549 GBP
Retailer 18£661 GBP
Retailer 8£681 GBP
Retailer 11£686 GBP
Retailer 3£714 GBP
Retailer 2£717 GBP
Retailer 12£921 GBP
Retailer 13£946 GBP
Retailer 5£1,076 GBP
Retailer 10£1,228 GBP
Retailer 6£1,424 GBP
Retailer 9£1,536 GBP
Retailer 14£1,604 GBP
Retailer 4£1,631 GBP
Retailer 15£2,142 GBP
Brilliant Earth£4,859 GBP

37 data points across 18 retailers

17 retailers£393 GBP to £4,859 GBP

A
Cheapest Retailer
-
£393 GBP
$526 USD
Final sale: no returns
Retailer 2
-
£436 GBP
$584 USD
View
Price last confirmed 15 days ago
Retailer 3
-
£549 GBP
View
Price last confirmed 15 days ago
A
Retailer 4
-
£661 GBP
$885 USD
View
B+
Retailer 5
-
£681 GBP
$913 USD
View
A
Retailer 6
-
£686 GBP
€875 EUR
View
A
Retailer 7
-
£714 GBP
$957 USD
View
A
Retailer 8
-
£717 GBP
View
A
Retailer 9
-
£921 GBP
A$1,898 AUD
View
A
Retailer 10
-
£946 GBP
ZAR 20,487 ZAR
View
A
Retailer 11
-
£1,076 GBP
$1,442 USD
View
B+
Retailer 12
-
£1,424 GBP
$1,908 USD
View
B+
Retailer 13
-
£1,536 GBP
$2,059 USD
View
B+
Retailer 14
-
£1,604 GBP
View
B+
Retailer 15
-
£1,631 GBP
$2,185 USD
View
Retailer 16
-
£2,142 GBP
$2,870 USD
View
Price last confirmed 13 days ago
Most Expensive
B
Brilliant Earth
18335227A · Oct 31
£4,859 GBP
$6,510 USD
View
16 more retailers have this diamond
Prices start from £393 GBPSave up to £4,466 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
£393 GBP