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Radiant|Lab Grown|IGI

1.54ct F SI1 Radiant Lab Grown Diamond

ID • F/SI1 • IGI LG551273804

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

Certificate IGI LG551273804

Diamond specifications and retailer prices

From £807 GBP
As of November 6, 2026
Save £335 GBP (29%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £1,141 GBP at Diamond Quarter · As of November 5, 2026
View at Diamond Quarter

About this 1.54ct lab-grown radiant diamond

This 1.54ct lab-grown radiant sits in the one-and-a-half to two carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG551273804 or 551273804. Listed at 2 retailers as of November 5, 2026, with prices from £807 to £1,141, a £335 spread on the same certified stone. Diamond Quarter lists it at £1,141. 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

1.54
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.7°
Pavilion angle35°
OriginLab Grown
Grading LabIGI
CertificateIGI LG551273804
Dimensions8.26 × 5.65 × 3.85 mm
L/W Ratio1.46
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
8.26 mm5.65 mm1.54 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG551273804
Side View
Table 65.0%Crown 42.7°Girdle: MediumPavilion 35°Culet: NoneDepth 68.1%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 6
Current: £258 GBP|Low: £249 GBP|High: £1,210 GBP|Avg: £590 GBP|-20.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
April 26, 2026
Retailer 6£249 GBP
Retailer 1£258 GBP
Retailer 3£372 GBP
Retailer 8£462 GBP
Retailer 2£465 GBP
Retailer 9£489 GBP
Retailer 5£524 GBP
Retailer 7£807 GBP
Retailer 4£1,046 GBP

53 data points across 9 retailers

2 retailers£807 GBP to £1,141 GBP

B
Cheapest Retailer
-
£807 GBP
Most Expensive
B
Diamond Quarter
1.54SI1FLG044709N · Nov 5
£1,141 GBP
View
1 more retailer has this diamond
Prices start from £807 GBPSave up to £335 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.

B
1.54ct Radiant
£807 GBP