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Cushion|Lab Grown|IGI

1.71ct F SI1 Cushion Lab Grown Diamond

ID • F/SI1 • IGI LG619425004

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG619425004

Diamond specifications and retailer prices

From £902 GBP
$1,210 USD
As of November 2, 2026
1 retailer carries this diamond
Only listing: £902 GBP at Brilliant Earth
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
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 F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG619425004 or 619425004. Listed at a single retailer as of November 2, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.71
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.7°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG619425004
Dimensions7.10 × 6.95 × 4.63 mm
L/W Ratio1.02
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
7.10 mm6.95 mm1.71 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG619425004
Side View
Table 61.0%Crown 34.7°Girdle: MED-STKPavilion 40.4°Culet: NoneDepth 66.6%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 2
Current: £902 GBP|Low: £317 GBP|High: £1,572 GBP|Avg: £795 GBP|-36.6%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 4, 2026
Retailer 5£317 GBP
Retailer 2£426 GBP
Retailer 4£549 GBP
Retailer 3£576 GBP
Retailer 7£684 GBP
Retailer 8£769 GBP
Brilliant Earth£902 GBP
Retailer 6£1,572 GBP

55 data points across 8 retailers

1 retailer

B
Brilliant Earth
9200469B · Nov 2
£902 GBP
$1,210 USD
View

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.

B
1.71ct Cushion
£902 GBP