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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 $1,000 USD
As of October 29, 2026
Save $4,188 USD (81%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $5,188 USD 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 $1,000 to $5,188, a $4,188 spread on the same certified stone. MOH London lists it at $5,188. 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
Color
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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: $5,188 USD|Low: $1,000 USD|High: $5,224 USD|Avg: $2,525 USD|+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$1,000 USD
Retailer 3$1,558 USD
Retailer 5$1,807 USD
Retailer 7$1,975 USD
Retailer 9$1,999 USD
Retailer 8$2,446 USD
Retailer 6$2,844 USD
Retailer 2$3,195 USD
MOH London$5,188 USD

11 data points across 9 retailers

10 retailers$1,000 USD to $5,188 USD

A
Cheapest Retailer
-
$1,000 USD
B+
Retailer 2
-
$1,558 USD
View
B+
Retailer 3
-
$1,695 USD
View
B+
Retailer 4
-
$1,807 USD
View
Retailer 5
-
$1,807 USD
View
Price last confirmed 18 days ago
B+
Retailer 6
-
$1,975 USD
View
B
Retailer 7
-
$2,844 USD
View
B
Retailer 8
-
$3,195 USD
View
B
Retailer 9
-
$3,387 USD
View
Most Expensive
B
MOH London
LG451057385 · Oct 29
$5,188 USD
£4,085 GBP
View
9 more retailers have this diamond
Prices start from $1,000 USDSave up to $4,188 USD

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
$1,000 USD