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Round|Lab Grown|IGI

1.28ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG819612892

Shape and cutting style on the report: Round brilliant

Certificate IGI LG819612892

Diamond specifications and retailer prices

From $247 AUD
As of November 5, 2026
Save $1,181 AUD (83%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $1,428 AUD at MOH London · As of November 5, 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 LG819612892 or 819612892. Listed at 14 retailers as of November 5, 2026, with prices from $247 to $1,428, a $1,181 spread on the same certified stone. MOH London lists it at $1,428. 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 angle34.3°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG819612892
Dimensions6.99 × 6.97 × 4.27 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 mm6.97 mm1.28 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG819612892
Side View
Table 59.0%Crown 34.3°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 61.2%

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: Nov 5
Current: $1,428 AUD|Low: $237 AUD|High: $1,450 AUD|Avg: $642 AUD|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 8$247 AUD
Retailer 10$287 AUD
Retailer 3$306 AUD
Retailer 9$306 AUD
Retailer 5$540 AUD
Retailer 11$546 AUD
Retailer 6$629 AUD
Retailer 2$677 AUD
Retailer 4$773 AUD
Retailer 12$984 AUD
Retailer 7$1,040 AUD
MOH London$1,428 AUD

46 data points across 12 retailers

14 retailers$247 AUD to $1,428 AUD

A
Cheapest Retailer
-
$247 AUD
A
Retailer 2
-
$287 AUD
View
Retailer 3
-
$306 AUD
View
Price last confirmed 12 days ago
A
Retailer 4
-
$306 AUD
View
A
Retailer 5
-
$540 AUD
View
B+
Retailer 6
-
$546 AUD
View
A
Retailer 7
-
$629 AUD
View
B+
Retailer 8
-
$650 AUD
View
A
Retailer 9
-
$677 AUD
View
B+
Retailer 10
-
$773 AUD
View
B
Retailer 11
-
$984 AUD
View
B+
Retailer 12
-
$1,040 AUD
View
B+
Retailer 13
-
$1,061 AUD
View
Most Expensive
B
MOH London
LG819612892 · Nov 5
$1,428 AUD
£787 GBP
View
13 more retailers have this diamond
Prices start from $247 AUDSave up to $1,181 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
$247 AUD