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Cushion|Lab Grown|IGI

4.05ct D VVS1 Cushion Lab Grown Diamond

ID • D/VVS1 • IGI LG660415012

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG660415012

Diamond specifications and retailer prices

From £1,358 GBP
$1,820 USD
As of October 31, 2026
Save £6,486 GBP (83%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £8,978 GBP at Brilliant Earth · As of October 21, 2026
View at Brilliant Earth

About this 4.05ct lab-grown cushion diamond

This 4.05ct lab-grown cushion sits in the three to five carat band, graded D colour (colourless) and VVS1 clarity (very-very-slightly-included), with a top-tier cut grade and certified by IGI LG660415012 or 660415012. Listed at 20 retailers as of October 31, 2026, with a 477% 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

4.05
Carat
D
Colour
VVS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle36.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG660415012
Dimensions10.44 × 8.68 × 5.72 mm
L/W Ratio1.20
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
10.44 mm8.68 mm4.05 ctD / VVS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG660415012
Side View
Table 60.0%Crown 34.5°Girdle: MED-STKPavilion 36.3°Culet: NoneDepth 65.9%

Caratlytics Score

How it works →
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 31
Current: £8,978 GBP|Low: £1,277 GBP|High: £8,978 GBP|Avg: £3,398 GBP
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
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Retailer 7
Retailer 8
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Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
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Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
October 31, 2026
Retailer 16£1,358 GBP
Retailer 14£1,464 GBP
Retailer 7£1,509 GBP
Retailer 10£1,823 GBP
Retailer 4£1,825 GBP
Retailer 15£2,070 GBP
Retailer 3£2,190 GBP
Retailer 2£2,305 GBP
Retailer 9£3,026 GBP
Retailer 17£3,109 GBP
Retailer 19£3,134 GBP
Retailer 5£3,790 GBP
Retailer 11£3,822 GBP
Retailer 20£4,071 GBP
Retailer 18£4,193 GBP
Retailer 13£4,776 GBP
Retailer 8£5,136 GBP
Retailer 12£5,270 GBP
Retailer 6£7,844 GBP
Brilliant Earth£8,978 GBP

35 data points across 20 retailers

20 retailers£1,358 GBP to £7,844 GBP

A
Cheapest Retailer
-
£1,358 GBP
$1,820 USD
A
Retailer 2
-
£1,464 GBP
$1,962 USD
View
Final sale: no returns
A
Retailer 3
-
£1,509 GBP
$2,022 USD
View
A
Retailer 4
-
£1,823 GBP
$2,443 USD
View
A
Retailer 5
-
£1,825 GBP
HK$19,100 HKD
View
A
Retailer 6
-
£2,070 GBP
View
B+
Retailer 7
-
£2,190 GBP
$2,935 USD
View
A
Retailer 8
-
£2,305 GBP
€2,942 EUR
View
B+
Retailer 9
-
£3,026 GBP
View
B+
Retailer 10
-
£3,109 GBP
ZAR 67,292 ZAR
View
Retailer 11
-
£3,134 GBP
A$6,460 AUD
View
Price last confirmed 10 days ago
B
Retailer 12
-
£3,790 GBP
$5,079 USD
View
B
Retailer 13
-
£3,822 GBP
$5,122 USD
View
Retailer 14
-
£4,071 GBP
$5,455 USD
View
Price last confirmed 13 days ago
B+
Retailer 15
-
£4,193 GBP
View
B
Retailer 16
-
£4,776 GBP
A$9,845 AUD
View
B
Retailer 17
-
£5,136 GBP
$6,882 USD
View
B
Retailer 18
-
£5,270 GBP
SGD 9,542 SGD
View
B
Retailer 19
-
£7,844 GBP
$10,510 USD
View
Most Expensive
Brilliant Earth
12545308Y · Oct 21
£8,978 GBP
$12,030 USD
View
Price last confirmed 10 days ago
19 more retailers have this diamond
Prices start from £1,358 GBPSave up to £6,486 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
4.05ct Cushion
£1,358 GBP