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Oval|Lab Grown|IGI

1.18ct E SI1 Oval Lab Grown Diamond

ID • E/SI1 • IGI LG818604621

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG818604621

Diamond specifications and retailer prices

From $285 NZD
As of November 5, 2026
Save $1,364 NZD (83%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $1,649 NZD at MOH London · As of November 4, 2026
View at MOH London

About this 1.18ct lab-grown oval diamond

This 1.18ct lab-grown oval sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG818604621 or 818604621. Listed at 9 retailers as of November 4, 2026, with prices from $285 to $1,649, a $1,364 spread on the same certified stone. MOH London lists it at $1,649. 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

1.18
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.4°
Pavilion angle41.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818604621
Dimensions8.81 × 6.04 × 3.65 mm
L/W Ratio1.46
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.81 mm6.04 mm1.18 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818604621
Side View
Table 60.0%Crown 33.4°Girdle: THN-MEDPavilion 41.5°Culet: NoneDepth 60.4%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 5
Current: $1,649 NZD|Low: $280 NZD|High: $1,649 NZD|Avg: $1,036 NZD|+4.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 4, 2026
Retailer 3$285 NZD
Retailer 5$332 NZD
Retailer 6$610 NZD
Retailer 7$934 NZD
Retailer 4$1,138 NZD
Retailer 8$1,173 NZD
Retailer 2$1,201 NZD
Retailer 9$1,405 NZD
MOH London$1,649 NZD

22 data points across 9 retailers

9 retailers$285 NZD to $1,649 NZD

A
Cheapest Retailer
-
$285 NZD
A
Retailer 2
-
$332 NZD
View
A
Retailer 3
-
$610 NZD
View
B+
Retailer 4
-
$934 NZD
View
B+
Retailer 5
-
$1,138 NZD
View
B
Retailer 6
-
$1,173 NZD
View
B
Retailer 7
-
$1,201 NZD
View
Retailer 8
-
$1,405 NZD
View
Price last confirmed 25 days ago
Most Expensive
B
MOH London
LG818604621 · Nov 4
$1,649 NZD
£720 GBP
View
8 more retailers have this diamond
Prices start from $285 NZDSave up to $1,364 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
1.18ct Oval
$285 NZD