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Heart|Lab Grown|IGI

1.71ct I SI2 Heart Lab Grown Diamond

GD • I/SI2 • IGI LG436044977

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG436044977

Diamond specifications and retailer prices

From £314 GBP
$421 USD
As of October 30, 2026
Save £1,058 GBP (77%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £1,372 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1.71ct lab-grown heart diamond

This 1.71ct lab-grown heart sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a standard cut grade and certified by IGI LG436044977 or 436044977. Listed at 5 retailers as of October 29, 2026, with prices from £314 to £1,372, a £1,058 spread on the same certified stone. MOH London lists it at £1,372. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.71
Carat
I
Colour
SI2
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.3°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG436044977
Dimensions6.91 × 6.85 × 4.58 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
6.91 mm6.85 mm1.71 ctI / SI2
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG436044977
Side View
Table 61.0%Crown 34.3°Girdle: STK-VTKPavilion 40.2°Culet: NoneDepth 66.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £1,372 GBP|Low: £307 GBP|High: £1,381 GBP|Avg: £712 GBP|-0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 29, 2026
Retailer 5£314 GBP
Retailer 2£349 GBP
Retailer 4£538 GBP
Retailer 3£557 GBP
Retailer 6£1,131 GBP
MOH London£1,372 GBP

10 data points across 6 retailers

5 retailers£314 GBP to £1,372 GBP

B+
Cheapest Retailer
-
£314 GBP
$421 USD
Final sale: no returns
B+
Retailer 2
-
£349 GBP
$468 USD
View
B+
Retailer 3
-
£538 GBP
$721 USD
View
B+
Retailer 4
-
£557 GBP
$746 USD
View
Most Expensive
B
MOH London
436044977 · Oct 29
£1,372 GBP
View
4 more retailers have this diamond
Prices start from £314 GBPSave up to £1,058 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.

B+
1.71ct Heart
£314 GBP