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Round|Lab Grown|IGI

1.54ct J SI1 Round Lab Grown Diamond

EX • J/SI1 • IGI LG485136600

Shape and cutting style on the report: Round brilliant

Certificate IGI LG485136600

Diamond specifications and retailer prices

From £642 GBP
$860 USD
As of October 31, 2026
Save £2,672 GBP (81%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £3,314 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 1.54ct lab-grown round diamond

This 1.54ct lab-grown round sits in the one-and-a-half to two carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG485136600 or 485136600. Listed at 11 retailers as of October 31, 2026, with prices from £642 to £3,314, a £2,672 spread on the same certified stone. MOH London lists it at £3,314. 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
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG485136600
Dimensions7.34 × 7.29 × 4.62 mm
L/W Ratio1.01
Girdle conditionFaceted
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
7.34 mm7.29 mm1.54 ctJ / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG485136600
Side View
Table 55.5%Crown 36°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 63.1%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: £3,314 GBP|Low: £642 GBP|High: £3,358 GBP|Avg: £1,534 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 1, 2026
Retailer 2£642 GBP
Retailer 3£889 GBP
Retailer 6£996 GBP
Retailer 4£1,031 GBP
Retailer 7£1,161 GBP
Retailer 9£1,462 GBP
Retailer 5£1,637 GBP
Retailer 8£1,976 GBP
MOH London£3,314 GBP

16 data points across 9 retailers

11 retailers£642 GBP to £3,314 GBP

A
Cheapest Retailer
-
£642 GBP
$860 USD
B+
Retailer 2
-
£889 GBP
$1,191 USD
View
B+
Retailer 3
-
£967 GBP
$1,296 USD
View
B+
Retailer 4
-
£996 GBP
$1,334 USD
View
Final sale: no returns
Retailer 5
-
£1,031 GBP
$1,382 USD
View
Price last confirmed 20 days ago
B+
Retailer 6
-
£1,031 GBP
$1,382 USD
View
B+
Retailer 7
-
£1,161 GBP
$1,555 USD
View
B
Retailer 8
-
£1,637 GBP
$2,193 USD
View
B
Retailer 9
-
£1,933 GBP
$2,590 USD
View
B
Retailer 10
-
£1,976 GBP
$2,647 USD
View
Most Expensive
B
MOH London
LG485136600 · Nov 1
£3,314 GBP
View
10 more retailers have this diamond
Prices start from £642 GBPSave up to £2,672 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 Round
£642 GBP