CaratHunter
Plans
Heart|Lab Grown|IGI

1.03ct E SI1 Heart Lab Grown Diamond

EX • E/SI1 • IGI LG839622790

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG839622790

Diamond specifications and retailer prices

From £127 GBP
As of November 6, 2026
Save £344 GBP (73%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £471 GBP at Brilliant Earth · As of November 6, 2026
View at Brilliant Earth

About this 1.03ct lab-grown heart diamond

This 1.03ct lab-grown heart sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG839622790 or 839622790. Listed at 3 retailers as of November 6, 2026, with prices from £127 to £471, a £344 spread on the same certified stone. Brilliant Earth lists it at £471. 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

1.03
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle39.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG839622790
Dimensions6.49 × 7.10 × 4.01 mm
L/W Ratio1.09
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.49 mm7.10 mm1.03 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG839622790
Side View
Table 59.0%Crown 34.5°Girdle: MED-STKPavilion 39.2°Culet: NoneDepth 56.5%

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 6
Current: £471 GBP|Low: £127 GBP|High: £680 GBP|Avg: £384 GBP|-30.8%
Brilliant Earth
Retailer 2
Retailer 3
November 5, 2026
Retailer 3£127 GBP
Retailer 2£252 GBP
Brilliant Earth£471 GBP

31 data points across 3 retailers

3 retailers£127 GBP to £471 GBP

A
Cheapest Retailer
-
£127 GBP
Final sale: no returns
B+
Retailer 2
-
£252 GBP
View
Most Expensive
B
Brilliant Earth
21583220A · Nov 6
£471 GBP
$630 USD
View
2 more retailers have this diamond
Prices start from £127 GBPSave up to £344 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
1.03ct Heart
£127 GBP