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Heart|Lab Grown|IGI

1.01ct E SI1 Heart Lab Grown Diamond

VG • E/SI1 • IGI LG839620543

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG839620543

Diamond specifications and retailer prices

From £128 GBP
As of November 6, 2026
Save £127 GBP (50%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £255 GBP at 77 Diamonds · As of November 6, 2026
View at 77 Diamonds

About this 1.01ct lab-grown heart diamond

This 1.01ct lab-grown heart sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG839620543 or 839620543. Listed at 2 retailers as of November 6, 2026, with prices from £128 to £255, a £127 spread on the same certified stone. 77 Diamonds lists it at £255. 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

1.01
Carat
E
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.6°
Pavilion angle40°
OriginLab Grown
Grading LabIGI
CertificateIGI LG839620543
Dimensions6.13 × 7.07 × 4.04 mm
L/W Ratio1.15
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.13 mm7.07 mm1.01 ctE / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG839620543
Side View
Table 60.0%Crown 33.6°Girdle: MED-STKPavilion 40°Culet: NoneDepth 57.1%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: £255 GBP|Low: £128 GBP|High: £287 GBP|Avg: £226 GBP|-11.0%
77 Diamonds
Retailer 2
November 6, 2026
Retailer 2£128 GBP
77 Diamonds£255 GBP

34 data points across 2 retailers

2 retailers£128 GBP to £255 GBP

A
Cheapest Retailer
-
£128 GBP
Final sale: no returns
Most Expensive
B+
77 Diamonds
HSTVSJTU3P6FP · Nov 6
£255 GBP
View
1 more retailer has this diamond
Prices start from £128 GBPSave up to £127 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
1.01ct Heart
£128 GBP