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Cushion|Lab Grown|IGI

1.71ct H SI2 Cushion Lab Grown Diamond

EX • H/SI2 • IGI LG12957714

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG12957714

Diamond specifications and retailer prices

From £540 GBP
As of November 5, 2026
Save £176 GBP (25%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £716 GBP at The Diamond Guys · As of November 6, 2026
View at The Diamond Guys

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 H colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG12957714 or 12957714. Listed at 2 retailers as of November 5, 2026, with prices from £540 to £716, a £176 spread on the same certified stone. The Diamond Guys lists it at £716. 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
H
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.5°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG12957714
Dimensions6.93 × 6.90 × 4.68 mm
L/W Ratio1.00
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment.
Top View
6.93 mm6.90 mm1.71 ctH / SI2
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG12957714
Side View
Table 62.0%Crown 33.5°Girdle: STK-UNDPavilion 40.7°Culet: NoneDepth 67.8%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 5
Current: £290 GBP|Low: £264 GBP|High: £2,524 GBP|Avg: £1,141 GBP|-64.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
The Diamond Guys
September 5, 2026
Retailer 3£281 GBP
Retailer 1£290 GBP
Retailer 4£425 GBP
Retailer 2£540 GBP
The Diamond Guys£716 GBP

21 data points across 5 retailers

2 retailers£540 GBP to £716 GBP

A
Cheapest Retailer
-
£540 GBP
Most Expensive
B+
The Diamond Guys
1779253541 · Nov 6
£716 GBP
$958 USD
View
1 more retailer has this diamond
Prices start from £540 GBPSave up to £176 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
£540 GBP