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Round|Lab Grown|IGI

1.28ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG818686822

Shape and cutting style on the report: Round brilliant

Certificate IGI LG818686822

Diamond specifications and retailer prices

From $244 AUD
As of November 5, 2026
Save $1,173 AUD (83%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $1,417 AUD at MOH London · As of November 2, 2026
View at MOH London

About this 1.28ct lab-grown round diamond

This 1.28ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG818686822 or 818686822. Listed at 16 retailers as of November 2, 2026, with prices from $244 to $1,417, a $1,173 spread on the same certified stone. MOH London lists it at $1,417. 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

1.28
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.4°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818686822
Dimensions6.99 × 7.00 × 4.28 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
6.99 mm7.00 mm1.28 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818686822
Side View
Table 58.0%Crown 34.4°Girdle: MediumPavilion 41°Culet: NoneDepth 61.2%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 5
Current: $1,417 AUD|Low: $234 AUD|High: $1,433 AUD|Avg: $665 AUD|-1.1%
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
Retailer 16
November 6, 2026
Retailer 14$244 AUD
Retailer 15$283 AUD
Retailer 3$303 AUD
Retailer 4$303 AUD
Retailer 2$520 AUD
Retailer 11$533 AUD
Retailer 16$541 AUD
Retailer 12$607 AUD
Retailer 7$650 AUD
Retailer 6$663 AUD
Retailer 9$670 AUD
Retailer 13$770 AUD
Retailer 10$914 AUD
Retailer 5$974 AUD
Retailer 8$1,051 AUD
MOH London$1,417 AUD

34 data points across 16 retailers

16 retailers$244 AUD to $1,417 AUD

A
Cheapest Retailer
-
$244 AUD
A
Retailer 2
-
$283 AUD
View
Retailer 3
-
$303 AUD
View
Price last confirmed 12 days ago
A
Retailer 4
-
$303 AUD
View
A
Retailer 5
-
$520 AUD
View
A
Retailer 6
-
$533 AUD
View
B+
Retailer 7
-
$541 AUD
View
A
Retailer 8
-
$607 AUD
View
B+
Retailer 9
-
$650 AUD
View
B+
Retailer 10
-
$663 AUD
View
A
Retailer 11
-
$670 AUD
View
B+
Retailer 12
-
$770 AUD
View
B
Retailer 13
-
$914 AUD
View
B
Retailer 14
-
$974 AUD
View
B+
Retailer 15
-
$1,051 AUD
View
Most Expensive
B
MOH London
LG818686822 · Nov 2
$1,417 AUD
£781 GBP
View
15 more retailers have this diamond
Prices start from $244 AUDSave up to $1,173 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
1.28ct Round
$244 AUD