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Heart|Lab Grown|IGI

1.39ct E SI1 Heart Lab Grown Diamond

E/SI1

Diamond specifications and retailer prices

From £250 GBP
As of November 6, 2026
Save £402 GBP (62%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £651 GBP at Diamond Exchange Canada · As of November 5, 2026
View at Diamond Exchange Canada

About this 1.39ct lab-grown heart diamond

This 1.39ct 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) and certified by IGI. Listed at 2 retailers as of November 5, 2026, with prices from £250 to £651, a £402 spread on the same certified stone. Diamond Exchange Canada lists it at £651. 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

1.39
Carat
E
Colour
SI1
Clarity
-
Cut

Specifications

Cut
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
Dimensions6.59 × 7.72 × 4.72 mm
L/W Ratio1.17
Top View
6.59 mm7.72 mm1.39 ctE / SI1
OriginLab Grown
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI
Side View
Table 58.0%CrownGirdlePavilionCulet: NoneDepth 61.0%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 6
Current: £651 GBP|Low: £250 GBP|High: £651 GBP|Avg: £452 GBP
Diamond Exchange Canada
Retailer 2
November 6, 2026
Retailer 2£250 GBP
Diamond Exchange Canada£651 GBP

38 data points across 2 retailers

2 retailers£250 GBP to £651 GBP

B+
Cheapest Retailer
-
£250 GBP
Most Expensive
C
Diamond Exchange Canada
1986486502 · Nov 5
£651 GBP
CA$1,211 CAD
View
1 more retailer has this diamond
Prices start from £250 GBPSave up to £402 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+
1.39ct Heart
£250 GBP