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Cushion|Lab Grown|IGI

3.00ct D VS1 Cushion Lab Grown Diamond

ID • D/VS1 • IGI LG731590309

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG731590309

Diamond specifications and retailer prices

From £424 GBP
$568 USD
As of October 30, 2026
Save £1,632 GBP (79%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: £4,717 GBP at Brilliant Earth · As of October 10, 2026
View at Brilliant Earth

About this 3ct lab-grown cushion diamond

This 3ct 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 LG731590309 or 731590309. Listed at 23 retailers as of October 30, 2026, with a 385% 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

3.00
Carat
D
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39°
Pavilion angle31.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG731590309
Dimensions10.59 × 6.82 × 4.55 mm
L/W Ratio1.55
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.59 mm6.82 mm3.00 ctD / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG731590309
Side View
Table 66.0%Crown 39°Girdle: STK-VTKPavilion 31.5°Culet: NoneDepth 66.7%

Caratlytics Score

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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: Oct 30
Current: £4,717 GBP|Low: £424 GBP|High: £4,717 GBP|Avg: £1,325 GBP
Brilliant Earth
Retailer 2
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Retailer 22
October 31, 2026
Retailer 6£424 GBP
Retailer 3£470 GBP
Retailer 21£516 GBP
Retailer 2£541 GBP
Retailer 22£631 GBP
Retailer 8£680 GBP
Retailer 18£721 GBP
Retailer 16£783 GBP
Retailer 17£993 GBP
Retailer 19£1,021 GBP
Retailer 5£1,031 GBP
Retailer 13£1,032 GBP
Retailer 11£1,044 GBP
Retailer 12£1,365 GBP
Retailer 10£1,488 GBP
Retailer 14£1,530 GBP
Retailer 7£1,624 GBP
Retailer 9£1,752 GBP
Retailer 4£1,820 GBP
Retailer 20£1,965 GBP
Retailer 15£2,067 GBP
Brilliant Earth£4,717 GBP

35 data points across 22 retailers

23 retailers£424 GBP to £2,056 GBP

A
Cheapest Retailer
-
£424 GBP
$568 USD
Final sale: no returns
Retailer 2
-
£470 GBP
$630 USD
View
Price last confirmed 15 days ago
A
Retailer 3
-
£516 GBP
HK$5,400 HKD
View
A
Retailer 4
-
£541 GBP
$725 USD
View
B+
Retailer 5
-
£631 GBP
$845 USD
View
A
Retailer 6
-
£680 GBP
$911 USD
View
A
Retailer 7
-
£721 GBP
€920 EUR
View
A
Retailer 8
-
£783 GBP
View
A
Retailer 9
-
£993 GBP
A$2,047 AUD
View
A
Retailer 10
-
£1,021 GBP
ZAR 22,092 ZAR
View
A
Retailer 11
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£1,031 GBP
$1,381 USD
View
A
Retailer 12
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£1,032 GBP
$1,383 USD
View
A
Retailer 13
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£1,044 GBP
$1,399 USD
View
B+
Retailer 14
-
£1,365 GBP
View
B+
Retailer 15
-
£1,488 GBP
SGD 2,695 SGD
View
B+
Retailer 16
-
£1,530 GBP
$2,050 USD
View
B+
Retailer 17
-
£1,624 GBP
$2,176 USD
View
B+
Retailer 18
-
£1,652 GBP
$2,213 USD
View
B+
Retailer 19
-
£1,752 GBP
$2,348 USD
View
Retailer 20
-
£1,820 GBP
A$3,751 AUD
View
Price last confirmed 27 days ago
B+
Retailer 21
-
£1,965 GBP
View
B
Retailer 22
-
£2,056 GBP
$2,755 USD
View
Most Expensive
Brilliant Earth
15621530A · Oct 10
£4,717 GBP
$6,320 USD
View
Price last confirmed 21 days ago
22 more retailers have this diamond
Prices start from £424 GBPSave up to £1,632 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
3.00ct Cushion
£424 GBP