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Round|Lab Grown|IGI

1.51ct J SI1 Round Lab Grown Diamond

EX • J/SI1 • IGI LG440013497

Shape and cutting style on the report: Round brilliant

Certificate IGI LG440013497

Diamond specifications and retailer prices

From £627 GBP
$840 USD
As of October 31, 2026
Save £2,624 GBP (81%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £3,251 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 1.51ct lab-grown round diamond

This 1.51ct 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 LG440013497 or 440013497. Listed at 11 retailers as of October 31, 2026, with prices from £627 to £3,251, a £2,624 spread on the same certified stone. MOH London lists it at £3,251. 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

1.51
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.4°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG440013497
Dimensions7.30 × 7.26 × 4.54 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.30 mm7.26 mm1.51 ctJ / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG440013497
Side View
Table 57.5%Crown 36.4°Girdle: ThickPavilion 40.2°Culet: NoneDepth 62.2%

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: £3,251 GBP|Low: £627 GBP|High: £3,290 GBP|Avg: £1,468 GBP|-1.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 1, 2026
Retailer 2£627 GBP
Retailer 7£872 GBP
Retailer 10£949 GBP
Retailer 12£976 GBP
Retailer 8£1,012 GBP
Retailer 13£1,012 GBP
Retailer 6£1,102 GBP
Retailer 14£1,142 GBP
Retailer 4£1,437 GBP
Retailer 9£1,607 GBP
Retailer 11£1,896 GBP
Retailer 3£1,993 GBP
Retailer 5£2,895 GBP
MOH London£3,251 GBP

16 data points across 14 retailers

11 retailers£627 GBP to £3,251 GBP

A
Cheapest Retailer
-
£627 GBP
$840 USD
B+
Retailer 2
-
£872 GBP
$1,169 USD
View
B+
Retailer 3
-
£949 GBP
$1,271 USD
View
B+
Retailer 4
-
£976 GBP
$1,308 USD
View
Final sale: no returns
Retailer 5
-
£1,012 GBP
$1,356 USD
View
Price last confirmed 20 days ago
B+
Retailer 6
-
£1,012 GBP
$1,356 USD
View
B+
Retailer 7
-
£1,142 GBP
$1,530 USD
View
B
Retailer 8
-
£1,607 GBP
$2,153 USD
View
B
Retailer 9
-
£1,896 GBP
$2,541 USD
View
B
Retailer 10
-
£1,993 GBP
$2,671 USD
View
Most Expensive
B
MOH London
LG440013497 · Nov 1
£3,251 GBP
View
10 more retailers have this diamond
Prices start from £627 GBPSave up to £2,624 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
1.51ct Round
£627 GBP