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Oval|Lab Grown|IGI

1.81ct I SI1 Oval Lab Grown Diamond

ID • I/SI1 • IGI LG451057385

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG451057385

Diamond specifications and retailer prices

From £746 GBP
$1,000 USD
As of October 29, 2026
Save £3,126 GBP (81%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £3,872 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1.81ct lab-grown oval diamond

This 1.81ct 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 LG451057385 or 451057385. Listed at 10 retailers as of October 29, 2026, with prices from £746 to £3,872, a £3,126 spread on the same certified stone. MOH London lists it at £3,872. 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

1.81
Carat
I
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle37.4°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451057385
Dimensions9.78 × 6.88 × 4.22 mm
L/W Ratio1.42
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
9.78 mm6.88 mm1.81 ctI / SI1
OriginLab Grown
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG451057385
Side View
Table 59.0%Crown 37.4°Girdle: THN-STKPavilion 40.3°Culet: NoneDepth 61.3%

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 29
Current: £3,872 GBP|Low: £746 GBP|High: £3,898 GBP|Avg: £1,884 GBP|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 29, 2026
Retailer 4£746 GBP
Retailer 3£1,163 GBP
Retailer 5£1,349 GBP
Retailer 7£1,474 GBP
Retailer 9£1,492 GBP
Retailer 8£1,826 GBP
Retailer 6£2,123 GBP
Retailer 2£2,385 GBP
MOH London£3,872 GBP

11 data points across 9 retailers

10 retailers£746 GBP to £3,872 GBP

A
Cheapest Retailer
-
£746 GBP
$1,000 USD
B+
Retailer 2
-
£1,163 GBP
$1,558 USD
View
B+
Retailer 3
-
£1,265 GBP
$1,695 USD
View
B+
Retailer 4
-
£1,349 GBP
$1,807 USD
View
Retailer 5
-
£1,349 GBP
$1,807 USD
View
Price last confirmed 18 days ago
B+
Retailer 6
-
£1,474 GBP
$1,975 USD
View
B
Retailer 7
-
£2,123 GBP
$2,844 USD
View
B
Retailer 8
-
£2,385 GBP
$3,195 USD
View
B
Retailer 9
-
£2,528 GBP
$3,387 USD
View
Most Expensive
B
MOH London
LG451057385 · Oct 29
£3,872 GBP
View
9 more retailers have this diamond
Prices start from £746 GBPSave up to £3,126 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
1.81ct Oval
£746 GBP