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Radiant|Lab Grown|IGI

1.64ct F IF Radiant Lab Grown Diamond

EX • F/IF • IGI LG729575026

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG729575026

Diamond specifications and retailer prices

From £360 GBP
As of November 2, 2026
Save £1,527 GBP (81%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £1,887 GBP at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

About this 1.64ct lab-grown radiant diamond

This 1.64ct lab-grown radiant sits in the one-and-a-half to two carat band, graded F colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG729575026 or 729575026. Listed at 7 retailers as of November 2, 2026, with prices from £360 to £1,887, a £1,527 spread on the same certified stone. Brilliant Earth lists it at £1,887. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.64
Carat
F
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42°
Pavilion angle34.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG729575026
Dimensions8.30 × 5.84 × 3.91 mm
L/W Ratio1.42
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
8.30 mm5.84 mm1.64 ctF / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG729575026
Side View
Table 63.0%Crown 42°Girdle: Slightly ThickPavilion 34.9°Culet: NoneDepth 67.0%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 2
Current: £1,887 GBP|Low: £360 GBP|High: £2,415 GBP|Avg: £1,110 GBP|-21.8%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 5, 2026
Retailer 4£360 GBP
Retailer 2£412 GBP
Retailer 5£756 GBP
Retailer 3£878 GBP
Retailer 6£1,724 GBP
Brilliant Earth£1,887 GBP

43 data points across 6 retailers

7 retailers£360 GBP to £1,887 GBP

A
Cheapest Retailer
-
£360 GBP
A
Retailer 2
-
£412 GBP
View
B+
Retailer 3
-
£756 GBP
View
B+
Retailer 4
-
£866 GBP
View
B+
Retailer 5
-
£878 GBP
View
Retailer 6
-
£1,724 GBP
View
Price last confirmed 18 days ago
Most Expensive
B
Brilliant Earth
16021313A · Nov 4
£1,887 GBP
$2,540 USD
View
6 more retailers have this diamond
Prices start from £360 GBPSave up to £1,527 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 Radiant
£360 GBP