Radiant|Lab Grown|IGI

1.53ct H IF Radiant Lab Grown Diamond

ID • H/IF • IGI LG644486939

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

Certificate IGI LG644486939

Diamond specifications and retailer prices

From £192 GBP
As of November 4, 2026
Save £1,430 GBP (88%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: £1,622 GBP at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

About this 1.53ct lab-grown radiant diamond

This 1.53ct lab-grown radiant sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG644486939 or 644486939. Listed at 25 retailers as of November 4, 2026, with prices from £192 to £1,622, a £1,430 spread on the same certified stone. Brilliant Earth lists it at £1,622. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.53
Carat
H
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.8°
Pavilion angle32.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG644486939
Dimensions8.41 × 5.64 × 3.68 mm
L/W Ratio1.49
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 Faint Blue
Top View
8.41 mm5.64 mm1.53 ctH / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG644486939
Side View
Table 65.0%Crown 41.8°Girdle: MED-STKPavilion 32.7°Culet: NoneDepth 65.2%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 4
Current: £1,622 GBP|Low: £192 GBP|High: £1,622 GBP|Avg: £619 GBP|+0.5%
Brilliant Earth
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November 5, 2026
Retailer 19£192 GBP
Retailer 4£222 GBP
Retailer 12£234 GBP
Retailer 8£257 GBP
Retailer 9£257 GBP
Retailer 17£257 GBP
Retailer 18£265 GBP
Retailer 23£320 GBP
Retailer 13£356 GBP
Retailer 6£443 GBP
Retailer 10£451 GBP
Retailer 11£455 GBP
Retailer 7£457 GBP
Retailer 5£602 GBP
Retailer 22£731 GBP
Retailer 20£764 GBP
Retailer 3£767 GBP
Retailer 21£802 GBP
Retailer 2£950 GBP
Retailer 16£981 GBP
Retailer 15£1,079 GBP
Retailer 14£1,111 GBP
Brilliant Earth£1,622 GBP

27 data points across 23 retailers

25 retailers£192 GBP to £1,622 GBP

A
Cheapest Retailer
-
£192 GBP
A
Retailer 2
-
£222 GBP
View
A
Retailer 3
-
£234 GBP
View
Final sale: no returns
Retailer 4
-
£257 GBP
View
Price last confirmed 11 days ago
A
Retailer 5
-
£257 GBP
View
A
Retailer 6
-
£257 GBP
View
A
Retailer 7
-
£265 GBP
View
B+
Retailer 8
-
£320 GBP
View
A
Retailer 9
-
£356 GBP
View
B+
Retailer 10
-
£443 GBP
View
A
Retailer 11
-
£451 GBP
View
A
Retailer 12
-
£455 GBP
View
B+
Retailer 13
-
£457 GBP
View
A
Retailer 14
-
£602 GBP
View
B+
Retailer 15
-
£731 GBP
View
B+
Retailer 16
-
£764 GBP
View
B+
Retailer 17
-
£767 GBP
View
B+
Retailer 18
-
£802 GBP
View
B+
Retailer 19
-
£950 GBP
View
Retailer 20
-
£981 GBP
View
Price last confirmed 23 days ago
Retailer 21
-
£1,079 GBP
View
Price last confirmed 22 days ago
Retailer 22
-
£1,111 GBP
View
Price last confirmed 18 days ago
Retailer 23
-
£1,130 GBP
View
Price last confirmed 66 days ago
B+
Retailer 24
-
£1,356 GBP
View
Most Expensive
B+
Brilliant Earth
19983871A · Nov 4
£1,622 GBP
$2,190 USD
View
24 more retailers have this diamond
Prices start from £192 GBPSave up to £1,430 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
1.53ct Radiant
£192 GBP