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Radiant|Lab Grown|IGI

1.54ct G SI1 Radiant Lab Grown Diamond

ID • G/SI1 • IGI LG604317104

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

Certificate IGI LG604317104

Diamond specifications and retailer prices

From £489 GBP
$655 USD
As of November 1, 2026
Save £7 GBP (1%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £496 GBP at Diamond Quarter · As of October 31, 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 G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG604317104 or 604317104. Listed at 2 retailers as of October 31, 2026, with a relatively tight 1% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle46.2°
Pavilion angle35.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG604317104
Dimensions7.99 × 5.60 × 3.95 mm
L/W Ratio1.43
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
7.99 mm5.60 mm1.54 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG604317104
Side View
Table 64.0%Crown 46.2°Girdle: MediumPavilion 35.4°Culet: NoneDepth 70.5%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 1
Current: £489 GBP|Low: £400 GBP|High: £843 GBP|Avg: £608 GBP|+4.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
September 23, 2026
Retailer 3£400 GBP
Retailer 1£489 GBP
Retailer 4£568 GBP
Retailer 2£609 GBP
Retailer 5£843 GBP

14 data points across 5 retailers

2 retailers£489 GBP to £496 GBP

B+
Cheapest Retailer
-
£489 GBP
$655 USD
Most Expensive
B+
Diamond Quarter
1.54SI1GLG041EAAN · Oct 31
£496 GBP
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1 more retailer has this diamond
Prices start from £489 GBPSave up to £7 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
£489 GBP