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Radiant|Lab Grown|IGI

1.54ct D SI1 Radiant Lab Grown Diamond

EX • D/SI1

Diamond specifications and retailer prices

From £368 GBP
$493 USD
As of October 30, 2026
Save £832 GBP (69%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £1,200 GBP at NZ Jewellers · As of October 28, 2026
View at NZ Jewellers

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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI. Listed at 5 retailers as of October 28, 2026, with prices from £368 to £1,200, a £832 spread on the same certified stone. NZ Jewellers lists it at £1,200. 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
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
Dimensions7.42 × 5.68 × 3.88 mm
L/W Ratio1.31
Top View
7.42 mm5.68 mm1.54 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI
Side View
Table 68.0%CrownGirdle: MediumPavilionCulet: NoneDepth 68.3%

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: Oct 30
Current: £1,200 GBP|Low: £265 GBP|High: £1,200 GBP|Avg: £547 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 30, 2026
Retailer 7£265 GBP
Retailer 5£368 GBP
Retailer 4£412 GBP
Retailer 3£456 GBP
Retailer 2£509 GBP
Retailer 6£847 GBP
NZ Jewellers£1,200 GBP

39 data points across 7 retailers

5 retailers£368 GBP to £1,200 GBP

A
Cheapest Retailer
-
£368 GBP
$493 USD
B+
Retailer 2
-
£412 GBP
$552 USD
View
B+
Retailer 3
-
£456 GBP
$611 USD
View
B+
Retailer 4
-
£509 GBP
View
Most Expensive
B
NZ Jewellers
1940ab90-0c08-4d6c-8aa6-403f394bc31a · Oct 28
£1,200 GBP
$1,608 USD
View
4 more retailers have this diamond
Prices start from £368 GBPSave up to £832 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
1.54ct Radiant
£368 GBP