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Round|Lab Grown|IGI

1.28ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG792617959

Shape and cutting style on the report: Round brilliant

Certificate IGI LG792617959

Diamond specifications and retailer prices

From $473 AUD
As of November 5, 2026
Save $1,300 AUD (73%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $1,772 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 E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG792617959 or 792617959. Listed at 8 retailers as of November 5, 2026, with prices from $473 to $1,772, a $1,300 spread on the same certified stone. MOH London lists it at $1,772. 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
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.8°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG792617959
Dimensions6.97 × 7.00 × 4.26 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
6.97 mm7.00 mm1.28 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG792617959
Side View
Table 60.0%Crown 34.8°Girdle: MediumPavilion 41°Culet: NoneDepth 60.9%

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: $1,772 AUD|Low: $454 AUD|High: $1,785 AUD|Avg: $945 AUD|+14.7%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 3$473 AUD
Retailer 4$657 AUD
Retailer 7$681 AUD
Retailer 2$833 AUD
Retailer 5$857 AUD
Retailer 8$1,184 AUD
Retailer 6$1,668 AUD
MOH London$1,772 AUD

32 data points across 8 retailers

8 retailers$473 AUD to $1,772 AUD

A
Cheapest Retailer
-
$473 AUD
B+
Retailer 2
-
$657 AUD
View
B+
Retailer 3
-
$681 AUD
View
B
Retailer 4
-
$833 AUD
View
B
Retailer 5
-
$857 AUD
View
B
Retailer 6
-
$1,184 AUD
View
B
Retailer 7
-
$1,668 AUD
View
Most Expensive
B
MOH London
LG792617959 · Nov 5
$1,772 AUD
£977 GBP
View
7 more retailers have this diamond
Prices start from $473 AUDSave up to $1,300 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
$473 AUD