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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 $1,774 NZD
$1,000 USD
As of October 31, 2026
Save $7,383 NZD (81%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $9,158 NZD at MOH London · As of November 1, 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 31, 2026, with prices from $1,774 to $9,158, a $7,383 spread on the same certified stone. MOH London lists it at $9,158. 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 31
Current: $9,158 NZD|Low: $1,774 NZD|High: $9,268 NZD|Avg: $4,467 NZD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 1, 2026
Retailer 4$1,774 NZD
Retailer 3$2,764 NZD
Retailer 5$3,206 NZD
Retailer 7$3,504 NZD
Retailer 9$3,546 NZD
Retailer 8$4,340 NZD
Retailer 6$5,046 NZD
Retailer 2$5,669 NZD
MOH London$9,158 NZD

12 data points across 9 retailers

10 retailers$1,774 NZD to $9,158 NZD

A
Cheapest Retailer
-
$1,774 NZD
$1,000 USD
B+
Retailer 2
-
$2,764 NZD
$1,558 USD
View
B+
Retailer 3
-
$3,007 NZD
$1,695 USD
View
B+
Retailer 4
-
$3,206 NZD
$1,807 USD
View
Retailer 5
-
$3,206 NZD
$1,807 USD
View
Price last confirmed 20 days ago
B+
Retailer 6
-
$3,504 NZD
$1,975 USD
View
B
Retailer 7
-
$5,046 NZD
$2,844 USD
View
B
Retailer 8
-
$5,669 NZD
$3,195 USD
View
B
Retailer 9
-
$6,010 NZD
$3,387 USD
View
Most Expensive
B
MOH London
LG451057385 · Nov 1
$9,158 NZD
£4,064 GBP
View
9 more retailers have this diamond
Prices start from $1,774 NZDSave up to $7,383 NZD

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
$1,774 NZD