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Cushion|Lab Grown|IGI

3.09ct D VS1 Cushion Lab Grown Diamond

EX • D/VS1 • IGI LG689542466

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

Certificate IGI LG689542466

Diamond specifications and retailer prices

From £433 GBP
$580 USD
As of October 31, 2026
Save £4,426 GBP (91%) vs most expensive(unlock to see where)
20 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 LG689542466 or 689542466. Listed at 20 retailers as of October 31, 2026, with prices from £433 to £4,859, a £4,426 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.4°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG689542466
Dimensions8.24 × 8.24 × 5.65 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.24 mm8.24 mm3.09 ctD / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG689542466
Side View
Table 65.0%Crown 37.4°Girdle: MED-THKPavilion 40.8°Culet: NoneDepth 68.6%

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: £424 GBP|High: £4,859 GBP|Avg: £1,276 GBP
Brilliant Earth
Retailer 2
Retailer 3
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Retailer 12
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Retailer 20
November 1, 2026
Retailer 20£433 GBP
Retailer 11£470 GBP
Retailer 9£525 GBP
Retailer 14£552 GBP
Retailer 4£625 GBP
Retailer 19£691 GBP
Retailer 13£716 GBP
Retailer 2£743 GBP
Retailer 15£1,012 GBP
Retailer 16£1,032 GBP
Retailer 17£1,087 GBP
Retailer 18£1,123 GBP
Retailer 12£1,376 GBP
Retailer 8£1,519 GBP
Retailer 3£1,559 GBP
Retailer 6£1,648 GBP
Retailer 5£1,717 GBP
Retailer 10£1,841 GBP
Retailer 7£2,012 GBP
Brilliant Earth£4,859 GBP

35 data points across 20 retailers

20 retailers£433 GBP to £4,859 GBP

A
Cheapest Retailer
-
£433 GBP
$580 USD
Final sale: no returns
Retailer 2
-
£470 GBP
$630 USD
View
Price last confirmed 21 days ago
A
Retailer 3
-
£525 GBP
HK$5,500 HKD
View
A
Retailer 4
-
£552 GBP
$740 USD
View
B+
Retailer 5
-
£625 GBP
$838 USD
View
A
Retailer 6
-
£691 GBP
$926 USD
View
A
Retailer 7
-
£716 GBP
€914 EUR
View
A
Retailer 8
-
£743 GBP
View
A
Retailer 9
-
£1,012 GBP
A$2,087 AUD
View
Retailer 10
-
£1,032 GBP
ZAR 22,328 ZAR
View
Price last confirmed 8 days ago
A
Retailer 11
-
£1,087 GBP
$1,457 USD
View
A
Retailer 12
-
£1,123 GBP
$1,505 USD
View
Retailer 13
-
£1,376 GBP
View
Price last confirmed 19 days ago
B+
Retailer 14
-
£1,519 GBP
SGD 2,751 SGD
View
B+
Retailer 15
-
£1,559 GBP
$2,089 USD
View
B+
Retailer 16
-
£1,648 GBP
$2,208 USD
View
B+
Retailer 17
-
£1,717 GBP
$2,301 USD
View
Retailer 18
-
£1,841 GBP
A$3,795 AUD
View
Price last confirmed 24 days ago
B+
Retailer 19
-
£2,012 GBP
View
Most Expensive
B
Brilliant Earth
20259914A · Oct 31
£4,859 GBP
$6,510 USD
View
19 more retailers have this diamond
Prices start from £433 GBPSave up to £4,426 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
£433 GBP