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Cushion|Lab Grown|IGI

1.71ct D VS1 Cushion Lab Grown Diamond

EX • D/VS1 • IGI LG665439079

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG665439079

Diamond specifications and retailer prices

From £241 GBP
$323 USD
As of November 1, 2026
Save £1,446 GBP (86%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £1,687 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.71ct lab-grown cushion diamond

This 1.71ct lab-grown cushion sits in the one-and-a-half to two carat band, graded D colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG665439079 or 665439079. Listed at 17 retailers as of October 31, 2026, with prices from £241 to £1,687, a £1,446 spread on the same certified stone. Brilliant Earth lists it at £1,687. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.71
Carat
D
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.4°
Pavilion angle39.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG665439079
Dimensions6.86 × 6.79 × 4.66 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.86 mm6.79 mm1.71 ctD / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG665439079
Side View
Table 61.0%Crown 36.4°Girdle: MED-STKPavilion 39.4°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: Nov 1
Current: £1,687 GBP|Low: £204 GBP|High: £1,776 GBP|Avg: £668 GBP|-5.0%
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
November 1, 2026
Retailer 7£241 GBP
Retailer 16£268 GBP
Retailer 15£299 GBP
Retailer 17£366 GBP
Retailer 11£399 GBP
Retailer 8£439 GBP
Retailer 13£460 GBP
Retailer 10£470 GBP
Retailer 5£495 GBP
Retailer 3£524 GBP
Retailer 12£622 GBP
Retailer 6£897 GBP
Retailer 14£1,008 GBP
Retailer 4£1,029 GBP
Retailer 2£1,073 GBP
Retailer 9£1,103 GBP
Brilliant Earth£1,687 GBP

39 data points across 17 retailers

17 retailers£241 GBP to £1,687 GBP

A
Cheapest Retailer
-
£241 GBP
$323 USD
Final sale: no returns
Retailer 2
-
£268 GBP
$359 USD
View
Price last confirmed 7 days ago
Retailer 3
-
£299 GBP
View
Price last confirmed 15 days ago
A
Retailer 4
-
£366 GBP
$490 USD
View
A
Retailer 5
-
£399 GBP
€509 EUR
View
A
Retailer 6
-
£439 GBP
$588 USD
View
A
Retailer 7
-
£460 GBP
ZAR 9,956 ZAR
View
A
Retailer 8
-
£470 GBP
View
A
Retailer 9
-
£495 GBP
$663 USD
View
B+
Retailer 10
-
£524 GBP
$702 USD
View
B+
Retailer 11
-
£622 GBP
A$1,283 AUD
View
B
Retailer 12
-
£897 GBP
$1,202 USD
View
Retailer 13
-
£1,008 GBP
$1,350 USD
View
Price last confirmed 11 days ago
B
Retailer 14
-
£1,029 GBP
$1,379 USD
View
B
Retailer 15
-
£1,073 GBP
View
B
Retailer 16
-
£1,103 GBP
$1,478 USD
View
Most Expensive
B
Brilliant Earth
12312888A · Oct 31
£1,687 GBP
$2,260 USD
View
16 more retailers have this diamond
Prices start from £241 GBPSave up to £1,446 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
1.71ct Cushion
£241 GBP