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Radiant|Lab Grown|IGI

1.54ct E SI1 Radiant Lab Grown Diamond

ID • E/SI1 • IGI LG492125287

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

Certificate IGI LG492125287

Diamond specifications and retailer prices

From £134 GBP
$179 USD
As of October 27, 2026
Save £1,671 GBP (93%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £1,805 GBP at B2C Jewels · As of October 29, 2026
View at B2C Jewels

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 E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG492125287 or 492125287. Listed at 13 retailers as of October 27, 2026, with prices from £134 to £1,805, a £1,671 spread on the same certified stone. B2C Jewels lists it at £1,805. 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
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38°
Pavilion angle28.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG492125287
Dimensions10.37 × 7.13 × 4.39 mm
L/W Ratio1.45
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
10.37 mm7.13 mm1.54 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG492125287
Side View
Table 61.5%Crown 38°Girdle: Slightly ThickPavilion 28.5°Culet: NoneDepth 65.4%

Caratlytics Score

How it works →
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 27
Current: £1,805 GBP|Low: £128 GBP|High: £1,805 GBP|Avg: £639 GBP
B2C Jewels
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 29, 2026
Retailer 6£134 GBP
Retailer 11£150 GBP
Retailer 10£155 GBP
Retailer 2£236 GBP
Retailer 8£293 GBP
Retailer 5£563 GBP
Retailer 9£587 GBP
Retailer 7£806 GBP
Retailer 4£857 GBP
Retailer 3£1,284 GBP
B2C Jewels£1,805 GBP

36 data points across 11 retailers

13 retailers£134 GBP to £1,805 GBP

A
Cheapest Retailer
-
£134 GBP
$179 USD
A
Retailer 2
-
£150 GBP
$201 USD
View
Final sale: no returns
A
Retailer 3
-
£155 GBP
$208 USD
View
A
Retailer 4
-
£236 GBP
View
B+
Retailer 5
-
£293 GBP
$393 USD
View
B
Retailer 6
-
£563 GBP
$754 USD
View
B+
Retailer 7
-
£587 GBP
$787 USD
View
B+
Retailer 8
-
£588 GBP
$788 USD
View
B
Retailer 9
-
£806 GBP
$1,080 USD
View
B
Retailer 10
-
£857 GBP
View
B
Retailer 11
-
£1,275 GBP
View
B
Retailer 12
-
£1,284 GBP
$1,720 USD
View
Most Expensive
B
B2C Jewels
20034071 · Oct 29
£1,805 GBP
$2,418 USD
View
12 more retailers have this diamond
Prices start from £134 GBPSave up to £1,671 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
£134 GBP