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Heart|Lab Grown|IGI

1.36ct E SI1 Heart Lab Grown Diamond

EX • E/SI1 • IGI LG579399715

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG579399715

Diamond specifications and retailer prices

From £205 GBP
As of November 6, 2026
Save £751 GBP (79%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £956 GBP at Michael Trio · As of November 6, 2026
View at Michael Trio

About this 1.36ct lab-grown heart diamond

This 1.36ct lab-grown heart sits in the one-and-a-quarter to one-and-a-half carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG579399715 or 579399715. Listed at 5 retailers as of November 6, 2026, with prices from £205 to £956, a £751 spread on the same certified stone. Michael Trio lists it at £956. 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

1.36
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37°
Pavilion angle38.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG579399715
Dimensions6.98 × 7.57 × 4.43 mm
L/W Ratio1.08
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
6.98 mm7.57 mm1.36 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG579399715
Side View
Table 57.0%Crown 37°Girdle: MED-THKPavilion 38.3°Culet: NoneDepth 58.5%

Caratlytics Score

How it works →
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: Nov 6
Current: £956 GBP|Low: £205 GBP|High: £956 GBP|Avg: £455 GBP
Michael Trio
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 29, 2026
Retailer 3£205 GBP
Retailer 4£302 GBP
Retailer 5£335 GBP
Retailer 2£480 GBP
Michael Trio£956 GBP

4 data points across 5 retailers

5 retailers£205 GBP to £956 GBP

A
Cheapest Retailer
-
£205 GBP
Final sale: no returns
A
Retailer 2
-
£302 GBP
View
B+
Retailer 3
-
£335 GBP
View
B+
Retailer 4
-
£480 GBP
View
Most Expensive
B
Michael Trio
5773730690 · Nov 6
£956 GBP
SGD 1,729 SGD
View
4 more retailers have this diamond
Prices start from £205 GBPSave up to £751 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
1.36ct Heart
£205 GBP