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Round|Lab Grown|IGI

1.09ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG818686663

Shape and cutting style on the report: Round brilliant

Certificate IGI LG818686663

Diamond specifications and retailer prices

From $204 AUD
$143 USD
As of October 29, 2026
Save $984 AUD (83%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,188 AUD at MOH London · As of October 29, 2026
View at MOH London

About this 1.09ct lab-grown round diamond

This 1.09ct lab-grown round sits in the classic one-carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG818686663 or 818686663. Listed at 15 retailers as of October 29, 2026, with prices from $204 to $1,188, a $984 spread on the same certified stone. MOH London lists it at $1,188. 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

1.09
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.3°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818686663
Dimensions6.60 × 6.69 × 4.07 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.60 mm6.69 mm1.09 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818686663
Side View
Table 56.0%Crown 35.3°Girdle: MediumPavilion 40.7°Culet: NoneDepth 61.4%

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: $1,188 AUD|Low: $204 AUD|High: $1,266 AUD|Avg: $580 AUD|-6.1%
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
Retailer 15
November 1, 2026
Retailer 10$204 AUD
Retailer 8$236 AUD
Retailer 6$253 AUD
Retailer 7$268 AUD
Retailer 2$434 AUD
Retailer 11$448 AUD
Retailer 15$471 AUD
Retailer 14$484 AUD
Retailer 9$565 AUD
Retailer 12$606 AUD
Retailer 4$638 AUD
Retailer 13$698 AUD
Retailer 5$813 AUD
Retailer 3$892 AUD
MOH London$1,188 AUD

28 data points across 15 retailers

15 retailers$204 AUD to $1,188 AUD

A
Cheapest Retailer
-
$204 AUD
$143 USD
A
Retailer 2
-
$236 AUD
$166 USD
View
A
Retailer 3
-
$253 AUD
$178 USD
View
A
Retailer 4
-
$268 AUD
$188 USD
View
A
Retailer 5
-
$434 AUD
£240 GBP
View
A
Retailer 6
-
$448 AUD
€300 EUR
View
A
Retailer 7
-
$471 AUD
$331 USD
View
A
Retailer 8
-
$484 AUD
$340 USD
View
B+
Retailer 9
-
$565 AUD
£312 GBP
View
B+
Retailer 10
-
$606 AUD
$426 USD
View
B+
Retailer 11
-
$638 AUD
$448 USD
View
B+
Retailer 12
-
$698 AUD
$490 USD
View
B+
Retailer 13
-
$813 AUD
$571 USD
View
B
Retailer 14
-
$892 AUD
$627 USD
View
Most Expensive
B
MOH London
LG818686663 · Oct 29
$1,188 AUD
£657 GBP
View
14 more retailers have this diamond
Prices start from $204 AUDSave up to $984 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
1.09ct Round
$204 AUD