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Heart|Lab Grown|IGI

1.56ct E SI1 Heart Lab Grown Diamond

EX • E/SI1 • IGI LG650418795

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG650418795

Diamond specifications and retailer prices

From £164 GBP
$220 USD
As of October 30, 2026
Save £664 GBP (80%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £828 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.56ct lab-grown heart diamond

This 1.56ct 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 LG650418795 or 650418795. Listed at 13 retailers as of October 29, 2026, with prices from £164 to £828, a £664 spread on the same certified stone. Brilliant Earth lists it at £828. 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

1.56
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.6°
Pavilion angle37.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG650418795
Dimensions6.99 × 7.90 × 4.71 mm
L/W Ratio1.13
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.99 mm7.90 mm1.56 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG650418795
Side View
Table 56.0%Crown 36.6°Girdle: STK-VTKPavilion 37.5°Culet: NoneDepth 59.6%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: £828 GBP|Low: £110 GBP|High: £858 GBP|Avg: £395 GBP|-3.5%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 30, 2026
Retailer 5£110 GBP
Retailer 3£164 GBP
Retailer 10£184 GBP
Retailer 12£190 GBP
Retailer 6£203 GBP
Retailer 11£272 GBP
Retailer 13£363 GBP
Retailer 2£377 GBP
Retailer 8£394 GBP
Retailer 4£546 GBP
Retailer 9£653 GBP
Retailer 7£819 GBP
Brilliant Earth£828 GBP

44 data points across 13 retailers

13 retailers£164 GBP to £828 GBP

A
Cheapest Retailer
-
£164 GBP
$220 USD
A
Retailer 2
-
£184 GBP
$246 USD
View
Final sale: no returns
A
Retailer 3
-
£190 GBP
$255 USD
View
A
Retailer 4
-
£203 GBP
$272 USD
View
A
Retailer 5
-
£210 GBP
$281 USD
View
B+
Retailer 6
-
£272 GBP
$365 USD
View
B+
Retailer 7
-
£363 GBP
$486 USD
View
B+
Retailer 8
-
£377 GBP
View
B+
Retailer 9
-
£394 GBP
$528 USD
View
B
Retailer 10
-
£546 GBP
$731 USD
View
B
Retailer 11
-
£653 GBP
$875 USD
View
B
Retailer 12
-
£819 GBP
View
Most Expensive
B
Brilliant Earth
12163591A · Oct 29
£828 GBP
$1,110 USD
View
12 more retailers have this diamond
Prices start from £164 GBPSave up to £664 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
1.56ct Heart
£164 GBP