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Cushion|Lab Grown|IGI

1.71ct D VS1 Cushion Lab Grown Diamond

ID • D/VS1 • IGI LG815692570

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG815692570

Diamond specifications and retailer prices

From £209 GBP
$280 USD
As of October 30, 2026
Save £1,105 GBP (84%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £1,314 GBP at Brilliant Earth · As of October 29, 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 LG815692570 or 815692570. Listed at 16 retailers as of October 29, 2026, with prices from £209 to £1,314, a £1,105 spread on the same certified stone. Brilliant Earth lists it at £1,314. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.9°
Pavilion angle38.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG815692570
Dimensions8.02 × 6.42 × 4.38 mm
L/W Ratio1.25
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.02 mm6.42 mm1.71 ctD / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG815692570
Side View
Table 67.0%Crown 33.9°Girdle: MED-THKPavilion 38.7°Culet: NoneDepth 68.2%

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 30
Current: £1,314 GBP|Low: £206 GBP|High: £1,470 GBP|Avg: £587 GBP|-10.7%
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
October 30, 2026
Retailer 6£209 GBP
Retailer 15£231 GBP
Retailer 13£259 GBP
Retailer 14£362 GBP
Retailer 7£387 GBP
Retailer 9£396 GBP
Retailer 11£398 GBP
Retailer 2£440 GBP
Retailer 4£485 GBP
Retailer 16£490 GBP
Retailer 12£539 GBP
Retailer 5£782 GBP
Retailer 3£911 GBP
Retailer 10£933 GBP
Retailer 8£1,010 GBP
Brilliant Earth£1,314 GBP

37 data points across 16 retailers

16 retailers£209 GBP to £1,314 GBP

A
Cheapest Retailer
-
£209 GBP
$280 USD
Final sale: no returns
A
Retailer 2
-
£231 GBP
$310 USD
View
Retailer 3
-
£259 GBP
View
Price last confirmed 14 days ago
A
Retailer 4
-
£362 GBP
$485 USD
View
A
Retailer 5
-
£387 GBP
$519 USD
View
A
Retailer 6
-
£396 GBP
€505 EUR
View
A
Retailer 7
-
£398 GBP
ZAR 8,605 ZAR
View
A
Retailer 8
-
£440 GBP
View
A
Retailer 9
-
£485 GBP
$650 USD
View
A
Retailer 10
-
£490 GBP
$657 USD
View
A
Retailer 11
-
£539 GBP
A$1,112 AUD
View
B+
Retailer 12
-
£782 GBP
$1,048 USD
View
B
Retailer 13
-
£911 GBP
$1,220 USD
View
B
Retailer 14
-
£933 GBP
View
B
Retailer 15
-
£1,010 GBP
$1,353 USD
View
Most Expensive
B
Brilliant Earth
20566399A · Oct 29
£1,314 GBP
$1,760 USD
View
15 more retailers have this diamond
Prices start from £209 GBPSave up to £1,105 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
£209 GBP