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Heart|Lab Grown|IGI

1.01ct K SI1 Heart Lab Grown Diamond

ID • K/SI1 • IGI LG805683590

Shape and cutting style on the report: Heart modified brilliant

Certificate IGI LG805683590

Diamond specifications and retailer prices

From £135 GBP
As of November 6, 2026
Save £645 GBP (83%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £780 GBP at MOH London · As of November 5, 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG805683590 or 805683590. Listed at 9 retailers as of November 5, 2026, with prices from £135 to £780, a £645 spread on the same certified stone. MOH London lists it at £780. 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
K
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.8°
Pavilion angle36.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG805683590
Dimensions6.66 × 5.45 × 3.63 mm
L/W Ratio1.22
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa Light Brown
Top View
6.66 mm5.45 mm1.01 ctK / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG805683590
Side View
Table 64.0%Crown 39.8°Girdle: STK-THKPavilion 36.8°Culet: NoneDepth 54.5%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: £780 GBP|Low: £129 GBP|High: £829 GBP|Avg: £370 GBP|-1.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 5, 2026
Retailer 5£135 GBP
Retailer 9£156 GBP
Retailer 6£167 GBP
Retailer 8£167 GBP
Retailer 2£284 GBP
Retailer 3£347 GBP
Retailer 11£388 GBP
Retailer 10£402 GBP
Retailer 7£538 GBP
Retailer 4£568 GBP
MOH London£780 GBP

16 data points across 11 retailers

9 retailers£135 GBP to £780 GBP

A
Cheapest Retailer
-
£135 GBP
A
Retailer 2
-
£156 GBP
View
Retailer 3
-
£167 GBP
View
Price last confirmed 12 days ago
B+
Retailer 4
-
£167 GBP
View
A
Retailer 5
-
£284 GBP
View
B+
Retailer 6
-
£402 GBP
View
B+
Retailer 7
-
£538 GBP
View
B+
Retailer 8
-
£568 GBP
View
Most Expensive
B
MOH London
LG805683590 · Nov 5
£780 GBP
View
8 more retailers have this diamond
Prices start from £135 GBPSave up to £645 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
£135 GBP