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1.55ct J SI1 Round Lab Grown Diamond

EX • J/SI1 • IGI LG440010935

Shape and cutting style on the report: Round brilliant

Certificate IGI LG440010935

Diamond specifications and retailer prices

From £642 GBP
$860 USD
As of October 31, 2026
Save £2,693 GBP (81%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £3,334 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 1.55ct lab-grown round diamond

This 1.55ct 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 LG440010935 or 440010935. Listed at 11 retailers as of October 31, 2026, with prices from £642 to £3,334, a £2,693 spread on the same certified stone. MOH London lists it at £3,334. 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

1.55
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle41.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG440010935
Dimensions7.43 × 7.38 × 4.60 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.43 mm7.38 mm1.55 ctJ / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG440010935
Side View
Table 59.5%Crown 35.2°Girdle: MediumPavilion 41.5°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: £3,334 GBP|Low: £642 GBP|High: £3,379 GBP|Avg: £1,673 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 2£642 GBP
Retailer 3£895 GBP
Retailer 6£1,002 GBP
Retailer 4£1,038 GBP
Retailer 7£1,168 GBP
Retailer 9£1,470 GBP
Retailer 5£1,646 GBP
Retailer 8£1,988 GBP
Retailer 10£2,970 GBP
MOH London£3,334 GBP

16 data points across 10 retailers

11 retailers£642 GBP to £3,334 GBP

A
Cheapest Retailer
-
£642 GBP
$860 USD
B+
Retailer 2
-
£895 GBP
$1,199 USD
View
B+
Retailer 3
-
£973 GBP
$1,304 USD
View
B+
Retailer 4
-
£1,002 GBP
$1,343 USD
View
Final sale: no returns
B+
Retailer 5
-
£1,038 GBP
$1,391 USD
View
Retailer 6
-
£1,038 GBP
$1,391 USD
View
Price last confirmed 20 days ago
B+
Retailer 7
-
£1,168 GBP
$1,565 USD
View
B
Retailer 8
-
£1,646 GBP
$2,206 USD
View
B
Retailer 9
-
£1,946 GBP
$2,607 USD
View
B
Retailer 10
-
£1,988 GBP
$2,664 USD
View
Most Expensive
B
MOH London
LG440010935 · Nov 1
£3,334 GBP
View
10 more retailers have this diamond
Prices start from £642 GBPSave up to £2,693 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
1.55ct Round
£642 GBP