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Round|Lab Grown|IGI

1.18ct G SI2 Round Lab Grown Diamond

ID • G/SI2 • IGI LG371992809

Shape and cutting style on the report: Round brilliant

Certificate IGI LG371992809

Diamond specifications and retailer prices

From $305 AUD
$214 USD
As of October 29, 2026
Save $1,377 AUD (82%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,681 AUD at MOH London · As of October 29, 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 G colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG371992809 or 371992809. Listed at 15 retailers as of October 29, 2026, with prices from $305 to $1,681, a $1,377 spread on the same certified stone. MOH London lists it at $1,681. 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
G
Colour
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG371992809
Dimensions6.76 × 6.81 × 4.20 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Chemical Vapor Deposition (CVD) laboratory grown diamond is classified as Type IIa
Top View
6.76 mm6.81 mm1.18 ctG / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG371992809
Side View
Table 58.0%Crown 35.5°Girdle: MediumPavilion 41°Culet: NoneDepth 61.9%

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: $1,681 AUD|Low: $305 AUD|High: $1,681 AUD|Avg: $815 AUD|+0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
October 31, 2026
Retailer 12$305 AUD
Retailer 10$353 AUD
Retailer 9$379 AUD
Retailer 13$379 AUD
Retailer 7$444 AUD
Retailer 8$629 AUD
Retailer 5$747 AUD
Retailer 2$787 AUD
Retailer 11$829 AUD
Retailer 6$972 AUD
Retailer 3$1,220 AUD
Retailer 4$1,304 AUD
Retailer 14$1,341 AUD
MOH London$1,681 AUD

15 data points across 14 retailers

15 retailers$305 AUD to $1,681 AUD

A
Cheapest Retailer
-
$305 AUD
$214 USD
A
Retailer 2
-
$353 AUD
$248 USD
View
A
Retailer 3
-
$379 AUD
$266 USD
View
A
Retailer 4
-
$379 AUD
$266 USD
View
B+
Retailer 5
-
$444 AUD
$312 USD
View
B+
Retailer 6
-
$629 AUD
£348 GBP
View
B
Retailer 7
-
$747 AUD
$524 USD
View
B
Retailer 8
-
$787 AUD
£435 GBP
View
B+
Retailer 9
-
$829 AUD
$582 USD
View
B
Retailer 10
-
$972 AUD
$683 USD
View
B
Retailer 11
-
$1,182 AUD
$830 USD
View
B
Retailer 12
-
$1,220 AUD
$857 USD
View
B
Retailer 13
-
$1,304 AUD
$916 USD
View
B
Retailer 14
-
$1,341 AUD
$942 USD
View
Most Expensive
B
MOH London
LG371992809 · Oct 29
$1,681 AUD
£930 GBP
View
14 more retailers have this diamond
Prices start from $305 AUDSave up to $1,377 AUD

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
$305 AUD