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Heart|Lab Grown|IGI

1.01ct D SI1 Heart Lab Grown Diamond

ID • D/SI1 • IGI LG621434474

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG621434474

Diamond specifications and retailer prices

From £165 GBP
As of November 6, 2026
Save £485 GBP (75%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £650 GBP at MOH London · As of November 2, 2026
View at MOH London

About this 1.01ct lab-grown heart diamond

This 1.01ct lab-grown heart sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG621434474 or 621434474. Listed at 15 retailers as of November 2, 2026, with prices from £165 to £650, a £485 spread on the same certified stone. MOH London lists it at £650. 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

1.01
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.2°
Pavilion angle36.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG621434474
Dimensions6.12 × 7.19 × 3.89 mm
L/W Ratio1.17
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
6.12 mm7.19 mm1.01 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG621434474
Side View
Table 61.0%Crown 34.2°Girdle: MED-VTKPavilion 36.3°Culet: NoneDepth 54.1%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £650 GBP|Low: £165 GBP|High: £658 GBP|Avg: £350 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 2£165 GBP
Retailer 3£238 GBP
Retailer 7£256 GBP
Retailer 5£264 GBP
Retailer 8£321 GBP
Retailer 4£361 GBP
Retailer 6£478 GBP
MOH London£650 GBP

41 data points across 8 retailers

15 retailers£165 GBP to £650 GBP

Retailer 1
-
£108 GBP
Price last confirmed 35 days ago
Retailer 2
-
£130 GBP
View
Price last confirmed 38 days ago
Retailer 3
-
£139 GBP
View
Price last confirmed 34 days ago
Retailer 4
-
£139 GBP
View
Price last confirmed 29 days ago
A
Retailer 5
-
£165 GBP
View
B+
Retailer 6
-
£238 GBP
View
B+
Retailer 7
-
£240 GBP
View
B+
Retailer 8
-
£256 GBP
View
B+
Retailer 9
-
£264 GBP
View
B+
Retailer 10
-
£321 GBP
View
B
Retailer 11
-
£361 GBP
View
Retailer 12
-
£447 GBP
View
Price last confirmed 37 days ago
B
Retailer 13
-
£470 GBP
View
B
Retailer 14
-
£478 GBP
View
Most Expensive
B
MOH London
LG621434474 · Nov 2
£650 GBP
View
14 more retailers have this diamond
Prices start from £165 GBPSave up to £485 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
£165 GBP