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Oval|Lab Grown|IGI

1.55ct I SI1 Oval Lab Grown Diamond

ID • I/SI1 • IGI LG440013405

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG440013405

Diamond specifications and retailer prices

From £642 GBP
$860 USD
As of October 31, 2026
Save £3,080 GBP (83%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £3,722 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 1.55ct lab-grown oval diamond

This 1.55ct lab-grown oval sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG440013405 or 440013405. Listed at 11 retailers as of October 31, 2026, with prices from £642 to £3,722, a £3,080 spread on the same certified stone. MOH London lists it at £3,722. 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
I
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.8°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG440013405
Dimensions9.14 × 6.51 × 4.11 mm
L/W Ratio1.40
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
9.14 mm6.51 mm1.55 ctI / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG440013405
Side View
Table 57.0%Crown 34.8°Girdle: STK-THKPavilion 40.9°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: £3,722 GBP|Low: £642 GBP|High: £3,771 GBP|Avg: £1,616 GBP|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 1, 2026
Retailer 5£642 GBP
Retailer 6£999 GBP
Retailer 10£1,087 GBP
Retailer 7£1,158 GBP
Retailer 11£1,158 GBP
Retailer 12£1,287 GBP
Retailer 4£1,592 GBP
Retailer 2£1,654 GBP
Retailer 8£1,831 GBP
Retailer 3£2,159 GBP
Retailer 9£2,171 GBP
MOH London£3,722 GBP

37 data points across 12 retailers

11 retailers£642 GBP to £3,722 GBP

A
Cheapest Retailer
-
£642 GBP
$860 USD
A
Retailer 2
-
£999 GBP
$1,338 USD
View
B+
Retailer 3
-
£1,087 GBP
$1,456 USD
View
Retailer 4
-
£1,158 GBP
$1,552 USD
View
Price last confirmed 20 days ago
B+
Retailer 5
-
£1,158 GBP
$1,552 USD
View
B+
Retailer 6
-
£1,287 GBP
$1,725 USD
View
B+
Retailer 7
-
£1,654 GBP
View
B
Retailer 8
-
£1,831 GBP
$2,453 USD
View
B
Retailer 9
-
£2,159 GBP
$2,893 USD
View
B
Retailer 10
-
£2,171 GBP
$2,909 USD
View
Most Expensive
B
MOH London
LG440013405 · Nov 1
£3,722 GBP
View
10 more retailers have this diamond
Prices start from £642 GBPSave up to £3,080 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 Oval
£642 GBP