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Heart|Lab Grown|IGI

1.27ct E SI1 Heart Lab Grown Diamond

ID • E/SI1 • IGI LG659468456

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG659468456

Diamond specifications and retailer prices

From £112 GBP
As of November 6, 2026
Save £539 GBP (83%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £651 GBP at MOH London · As of November 2, 2026
View at MOH London

About this 1.27ct lab-grown heart diamond

This 1.27ct 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), with a top-tier cut grade and certified by IGI LG659468456 or 659468456. Listed at 13 retailers as of November 2, 2026, with prices from £112 to £651, a £539 spread on the same certified stone. MOH London lists it at £651. 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

1.27
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG659468456
Dimensions7.53 × 6.62 × 4.48 mm
L/W Ratio1.14
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.53 mm6.62 mm1.27 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG659468456
Side View
Table 58.0%Crown 35.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 59.5%

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: £651 GBP|Low: £108 GBP|High: £658 GBP|Avg: £290 GBP|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 6, 2026
Retailer 11£112 GBP
Retailer 3£130 GBP
Retailer 5£139 GBP
Retailer 12£139 GBP
Retailer 9£181 GBP
Retailer 2£238 GBP
Retailer 14£256 GBP
Retailer 8£270 GBP
Retailer 4£316 GBP
Retailer 6£329 GBP
Retailer 7£344 GBP
Retailer 13£448 GBP
Retailer 10£472 GBP
MOH London£651 GBP

45 data points across 14 retailers

13 retailers£112 GBP to £651 GBP

A
Cheapest Retailer
-
£112 GBP
A
Retailer 2
-
£130 GBP
View
A
Retailer 3
-
£139 GBP
View
Retailer 4
-
£139 GBP
View
Price last confirmed 12 days ago
A
Retailer 5
-
£238 GBP
View
B+
Retailer 6
-
£256 GBP
View
A
Retailer 7
-
£270 GBP
View
B+
Retailer 8
-
£316 GBP
View
B+
Retailer 9
-
£329 GBP
View
B+
Retailer 10
-
£344 GBP
View
B+
Retailer 11
-
£448 GBP
View
B+
Retailer 12
-
£472 GBP
View
Most Expensive
B
MOH London
LG659468456 · Nov 2
£651 GBP
View
12 more retailers have this diamond
Prices start from £112 GBPSave up to £539 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
1.27ct Heart
£112 GBP