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Heart|Lab Grown|IGI

1.64ct G SI1 Heart Lab Grown Diamond

ID • G/SI1 • IGI LG659468439

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG659468439

Diamond specifications and retailer prices

From £166 GBP
As of November 6, 2026
Save £659 GBP (80%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £825 GBP at MOH London · As of November 2, 2026
View at MOH London

About this 1.64ct lab-grown heart diamond

This 1.64ct lab-grown heart sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG659468439 or 659468439. Listed at 12 retailers as of November 2, 2026, with prices from £166 to £825, a £659 spread on the same certified stone. MOH London lists it at £825. 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

1.64
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle34.6°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG659468439
Dimensions7.35 × 8.28 × 4.77 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
7.35 mm8.28 mm1.64 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG659468439
Side View
Table 58.0%Crown 34.6°Girdle: MED-THKPavilion 40.2°Culet: NoneDepth 57.6%

Caratlytics Score

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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: £825 GBP|Low: £159 GBP|High: £835 GBP|Avg: £392 GBP|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 7£166 GBP
Retailer 11£193 GBP
Retailer 3£205 GBP
Retailer 8£205 GBP
Retailer 2£261 GBP
Retailer 10£352 GBP
Retailer 5£379 GBP
Retailer 4£399 GBP
Retailer 12£415 GBP
Retailer 9£662 GBP
Retailer 6£664 GBP
MOH London£825 GBP

46 data points across 12 retailers

12 retailers£166 GBP to £825 GBP

A
Cheapest Retailer
-
£166 GBP
A
Retailer 2
-
£193 GBP
View
A
Retailer 3
-
£205 GBP
View
Retailer 4
-
£205 GBP
View
Price last confirmed 12 days ago
A
Retailer 5
-
£261 GBP
View
B+
Retailer 6
-
£352 GBP
View
B+
Retailer 7
-
£379 GBP
View
B+
Retailer 8
-
£399 GBP
View
B+
Retailer 9
-
£415 GBP
View
B
Retailer 10
-
£662 GBP
View
B
Retailer 11
-
£664 GBP
View
Most Expensive
B
MOH London
LG659468439 · Nov 2
£825 GBP
View
11 more retailers have this diamond
Prices start from £166 GBPSave up to £659 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
1.64ct Heart
£166 GBP