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Round|Lab Grown|IGI

1.18ct I SI1 Round Lab Grown Diamond

ID • I/SI1 • IGI LG375933901

Shape and cutting style on the report: Round brilliant

Certificate IGI LG375933901

Diamond specifications and retailer prices

From $665 NZD
$375 USD
As of November 1, 2026
Save $1,255 NZD (65%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $1,920 NZD at MOH London · As of November 1, 2026
View at MOH London

About this 1.18ct lab-grown round diamond

This 1.18ct lab-grown round sits in the classic one-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG375933901 or 375933901. Listed at 5 retailers as of November 1, 2026, with prices from $665 to $1,920, a $1,255 spread on the same certified stone. MOH London lists it at $1,920. 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
I
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG375933901
Dimensions6.77 × 6.74 × 4.19 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Chemical Vapor Deposition (CVD) laboratory grown diamond is classified as Type IIa
Top View
6.77 mm6.74 mm1.18 ctI / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG375933901
Side View
Table 55.5%Crown 36°Girdle: MediumPavilion 40.2°Culet: NoneDepth 62.0%

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: Nov 1
Current: $1,920 NZD|Low: $621 NZD|High: $1,945 NZD|Avg: $1,023 NZD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 1, 2026
Retailer 3$665 NZD
Retailer 2$745 NZD
Retailer 5$837 NZD
Retailer 4$946 NZD
MOH London$1,920 NZD

11 data points across 5 retailers

5 retailers$665 NZD to $1,920 NZD

A
Cheapest Retailer
-
$665 NZD
$375 USD
A
Retailer 2
-
$745 NZD
$420 USD
View
A
Retailer 3
-
$837 NZD
$472 USD
View
A
Retailer 4
-
$946 NZD
$533 USD
View
Most Expensive
A
MOH London
LG375933901 · Nov 1
$1,920 NZD
£852 GBP
View
4 more retailers have this diamond
Prices start from $665 NZDSave up to $1,255 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 Round
$665 NZD