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Oval|Lab Grown|IGI

1.28ct D SI1 Oval Lab Grown Diamond

ID • D/SI1 • IGI LG621476577

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG621476577

Diamond specifications and retailer prices

From $243 AUD
As of November 3, 2026
Save $1,164 AUD (83%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $1,407 AUD at MOH London · As of November 4, 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG621476577 or 621476577. Listed at 14 retailers as of November 3, 2026, with prices from $243 to $1,407, a $1,164 spread on the same certified stone. MOH London lists it at $1,407. 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
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.7°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG621476577
Dimensions9.06 × 6.04 × 3.75 mm
L/W Ratio1.50
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
9.06 mm6.04 mm1.28 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG621476577
Side View
Table 60.0%Crown 35.7°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.1%

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 3
Current: $1,407 AUD|Low: $243 AUD|High: $1,427 AUD|Avg: $669 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
Retailer 13
Retailer 14
Retailer 15
November 4, 2026
Retailer 3$243 AUD
Retailer 10$282 AUD
Retailer 13$301 AUD
Retailer 14$301 AUD
Retailer 12$362 AUD
Retailer 8$530 AUD
Retailer 9$534 AUD
Retailer 4$543 AUD
Retailer 7$700 AUD
Retailer 6$777 AUD
Retailer 2$881 AUD
Retailer 15$969 AUD
Retailer 11$1,025 AUD
Retailer 5$1,092 AUD
MOH London$1,407 AUD

38 data points across 15 retailers

14 retailers$243 AUD to $1,407 AUD

A
Cheapest Retailer
-
$243 AUD
A
Retailer 2
-
$282 AUD
View
Retailer 3
-
$301 AUD
View
Price last confirmed 12 days ago
A
Retailer 4
-
$301 AUD
View
A
Retailer 5
-
$530 AUD
View
A
Retailer 6
-
$534 AUD
View
B+
Retailer 7
-
$543 AUD
View
B+
Retailer 8
-
$700 AUD
View
B+
Retailer 9
-
$777 AUD
View
B+
Retailer 10
-
$881 AUD
View
B+
Retailer 11
-
$969 AUD
View
B
Retailer 12
-
$1,025 AUD
View
B
Retailer 13
-
$1,092 AUD
View
Most Expensive
B
MOH London
LG621476577 · Nov 4
$1,407 AUD
£761 GBP
View
13 more retailers have this diamond
Prices start from $243 AUDSave up to $1,164 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
$243 AUD