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Round|Lab Grown|IGI

1.09ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG842612901

Shape and cutting style on the report: Round brilliant

Certificate IGI LG842612901

Diamond specifications and retailer prices

From $236 AUD
$166 USD
As of October 30, 2026
Save $656 AUD (74%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $1,224 AUD at MOH London · As of October 25, 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 LG842612901 or 842612901. Listed at 8 retailers as of October 30, 2026, with a 277% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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 angle34.7°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG842612901
Dimensions6.58 × 6.56 × 4.09 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.58 mm6.56 mm1.09 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG842612901
Side View
Table 58.0%Crown 34.7°Girdle: MED-STKPavilion 41.3°Culet: NoneDepth 62.2%

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 30
Current: $1,224 AUD|Low: $429 AUD|High: $1,237 AUD|Avg: $674 AUD|-1.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 1, 2026
Retailer 3$434 AUD
Retailer 4$448 AUD
Retailer 6$471 AUD
Retailer 5$484 AUD
Retailer 2$563 AUD
Retailer 7$892 AUD
MOH London$1,224 AUD

17 data points across 7 retailers

8 retailers$236 AUD to $892 AUD

A
Cheapest Retailer
-
$236 AUD
$166 USD
A
Retailer 2
-
$434 AUD
£240 GBP
View
A
Retailer 3
-
$448 AUD
€300 EUR
View
A
Retailer 4
-
$471 AUD
$331 USD
View
A
Retailer 5
-
$484 AUD
$340 USD
View
Retailer 6
-
$563 AUD
£311 GBP
View
B
Retailer 7
-
$892 AUD
$627 USD
View
Most Expensive
B
MOH London
LG842612901 · Oct 25
$1,224 AUD
£677 GBP
View
Price last confirmed 7 days ago
7 more retailers have this diamond
Prices start from $236 AUDSave up to $656 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
$236 AUD