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Oval|Lab Grown|IGI

1.28ct F SI1 Oval Lab Grown Diamond

ID • F/SI1 • IGI LG729580171

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG729580171

Diamond specifications and retailer prices

From $236 AUD
$166 USD
As of November 1, 2026
Save $1,132 AUD (83%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $1,369 AUD at MOH London · As of November 1, 2026
View at MOH London

About this 1.28ct lab-grown oval diamond

This 1.28ct lab-grown oval sits in the one-and-a-quarter to one-and-a-half carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG729580171 or 729580171. Listed at 12 retailers as of November 1, 2026, with prices from $236 to $1,369, a $1,132 spread on the same certified stone. MOH London lists it at $1,369. 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
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG729580171
Dimensions9.06 × 6.11 × 3.68 mm
L/W Ratio1.48
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.06 mm6.11 mm1.28 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG729580171
Side View
Table 61.0%Crown 32°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 60.2%

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 1
Current: $1,369 AUD|Low: $236 AUD|High: $1,893 AUD|Avg: $754 AUD|-0.5%
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 2, 2026
Retailer 11$236 AUD
Retailer 4$273 AUD
Retailer 12$293 AUD
Retailer 15$328 AUD
Retailer 9$379 AUD
Retailer 2$519 AUD
Retailer 16$528 AUD
Retailer 5$556 AUD
Retailer 14$639 AUD
Retailer 13$652 AUD
Retailer 3$941 AUD
Retailer 10$994 AUD
Retailer 7$998 AUD
Retailer 6$1,317 AUD
MOH London$1,369 AUD
Retailer 8$1,893 AUD

7 data points across 16 retailers

12 retailers$236 AUD to $1,369 AUD

A
Cheapest Retailer
-
$236 AUD
$166 USD
A
Retailer 2
-
$273 AUD
$192 USD
View
A
Retailer 3
-
$293 AUD
$206 USD
View
A
Retailer 4
-
$328 AUD
HK$1,800 HKD
View
A
Retailer 5
-
$379 AUD
£210 GBP
View
A
Retailer 6
-
$519 AUD
£287 GBP
View
B+
Retailer 7
-
$528 AUD
$371 USD
View
B+
Retailer 8
-
$639 AUD
$449 USD
View
B+
Retailer 9
-
$652 AUD
$458 USD
View
B
Retailer 10
-
$941 AUD
$661 USD
View
B
Retailer 11
-
$994 AUD
$698 USD
View
Most Expensive
B
MOH London
LG729580171 · Nov 1
$1,369 AUD
£757 GBP
View
11 more retailers have this diamond
Prices start from $236 AUDSave up to $1,132 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 Oval
$236 AUD