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Cushion|Lab Grown|IGI

1.71ct H SI1 Cushion Lab Grown Diamond

EX • H/SI1 • IGI LG515227082

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG515227082

Diamond specifications and retailer prices

From £285 GBP
$382 USD
As of November 1, 2026
Save £1,467 GBP (84%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £1,751 GBP at Do Amore Diamonds · As of November 2, 2026
View at Do Amore Diamonds

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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG515227082 or 515227082. Listed at 10 retailers as of November 1, 2026, with prices from £285 to £1,751, a £1,467 spread on the same certified stone. Do Amore Diamonds lists it at £1,751. 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG515227082
Dimensions6.88 × 6.83 × 4.68 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
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
6.88 mm6.83 mm1.71 ctH / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG515227082
Side View
Table 62.0%Crown 35°Girdle: STK-VTKPavilion 40.6°Culet: NoneDepth 68.5%

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: Nov 1
Current: £1,751 GBP|Low: £285 GBP|High: £1,751 GBP|Avg: £752 GBP|+17.5%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 5£285 GBP
Retailer 7£339 GBP
Retailer 2£356 GBP
Retailer 4£361 GBP
Retailer 9£493 GBP
Retailer 8£652 GBP
Retailer 10£867 GBP
Retailer 3£976 GBP
Retailer 6£1,083 GBP
Do Amore Diamonds£1,751 GBP

28 data points across 10 retailers

10 retailers£285 GBP to £1,751 GBP

B+
Cheapest Retailer
-
£285 GBP
$382 USD
A
Retailer 2
-
£339 GBP
$455 USD
View
B+
Retailer 3
-
£356 GBP
View
A
Retailer 4
-
£361 GBP
$485 USD
View
A
Retailer 5
-
£493 GBP
$662 USD
View
B+
Retailer 6
-
£652 GBP
$875 USD
View
B+
Retailer 7
-
£867 GBP
$1,163 USD
View
B
Retailer 8
-
£976 GBP
$1,310 USD
View
B
Retailer 9
-
£1,083 GBP
View
Most Expensive
B
Do Amore Diamonds
27-0CB569BFC · Nov 2
£1,751 GBP
$2,350 USD
View
9 more retailers have this diamond
Prices start from £285 GBPSave up to £1,467 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
£285 GBP