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Heart|Lab Grown|IGI

1.51ct E SI1 Heart Lab Grown Diamond

EX • E/SI1 • IGI LG706553053

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG706553053

Diamond specifications and retailer prices

From £339 GBP
$451 USD
As of October 28, 2026
Save £451 GBP (57%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £790 GBP at MOH London · As of October 26, 2026
View at MOH London

About this 1.51ct lab-grown heart diamond

This 1.51ct lab-grown heart sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG706553053 or 706553053. Listed at 3 retailers as of October 26, 2026, with prices from £339 to £790, a £451 spread on the same certified stone. MOH London lists it at £790. 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

1.51
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.8°
Pavilion angle39.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG706553053
Dimensions6.82 × 7.95 × 4.66 mm
L/W Ratio1.17
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.82 mm7.95 mm1.51 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG706553053
Side View
Table 61.0%Crown 35.8°Girdle: MED-THKPavilion 39.2°Culet: NoneDepth 58.6%

Caratlytics Score

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

Price History

Last verified: Oct 28
Current: £790 GBP|Low: £320 GBP|High: £798 GBP|Avg: £523 GBP|-1.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 25, 2026
Retailer 2£339 GBP
Retailer 4£359 GBP
Retailer 5£448 GBP
Retailer 3£678 GBP
MOH London£790 GBP

8 data points across 5 retailers

3 retailers£339 GBP to £790 GBP

B+
Cheapest Retailer
-
£339 GBP
$451 USD
B
Retailer 2
-
£678 GBP
$902 USD
View
Most Expensive
B
MOH London
LG706553053 · Oct 26
£790 GBP
View
2 more retailers have this diamond
Prices start from £339 GBPSave up to £451 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+
1.51ct Heart
£339 GBP