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Oval|Lab Grown|IGI

1.55ct I SI1 Oval Lab Grown Diamond

ID • I/SI1 • IGI LG447000641

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG447000641

Diamond specifications and retailer prices

From £634 GBP
$850 USD
As of October 31, 2026
Save £3,088 GBP (83%) vs most expensive(unlock to see where)
12 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 LG447000641 or 447000641. Listed at 12 retailers as of October 31, 2026, with prices from £634 to £3,722, a £3,088 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
SymmetryVery Good
FluorescenceNone
Crown angle34.4°
Pavilion angle41.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG447000641
Dimensions9.09 × 6.59 × 4.12 mm
L/W Ratio1.38
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
9.09 mm6.59 mm1.55 ctI / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG447000641
Side View
Table 57.5%Crown 34.4°Girdle: MED-THKPavilion 41.9°Culet: NoneDepth 62.5%

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: £634 GBP|High: £3,771 GBP|Avg: £1,700 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
Retailer 13
Retailer 14
November 1, 2026
Retailer 8£634 GBP
Retailer 7£999 GBP
Retailer 12£1,087 GBP
Retailer 13£1,118 GBP
Retailer 9£1,158 GBP
Retailer 14£1,158 GBP
Retailer 3£1,287 GBP
Retailer 5£1,592 GBP
Retailer 2£1,654 GBP
Retailer 10£1,831 GBP
Retailer 4£2,159 GBP
Retailer 11£2,171 GBP
Retailer 6£3,316 GBP
MOH London£3,722 GBP

38 data points across 14 retailers

12 retailers£634 GBP to £3,722 GBP

A
Cheapest Retailer
-
£634 GBP
$850 USD
B+
Retailer 2
-
£999 GBP
$1,338 USD
View
B+
Retailer 3
-
£1,087 GBP
$1,456 USD
View
B+
Retailer 4
-
£1,118 GBP
$1,498 USD
View
Final sale: no returns
Retailer 5
-
£1,158 GBP
$1,552 USD
View
Price last confirmed 20 days ago
B+
Retailer 6
-
£1,158 GBP
$1,552 USD
View
B+
Retailer 7
-
£1,287 GBP
$1,725 USD
View
B
Retailer 8
-
£1,654 GBP
View
B
Retailer 9
-
£1,831 GBP
$2,453 USD
View
B
Retailer 10
-
£2,159 GBP
$2,893 USD
View
B
Retailer 11
-
£2,171 GBP
$2,909 USD
View
Most Expensive
B
MOH London
LG447000641 · Nov 1
£3,722 GBP
View
11 more retailers have this diamond
Prices start from £634 GBPSave up to £3,088 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
£634 GBP