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Marquise|Lab Grown|IGI

1.28ct G VS1 Marquise Lab Grown Diamond

ID • G/VS1 • IGI LG845654640

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG845654640

Diamond specifications and retailer prices

From $426 AUD
As of November 5, 2026
Save $1,303 AUD (75%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $1,728 AUD at Brilliant Earth · As of November 5, 2026
View at Brilliant Earth

About this 1.28ct lab-grown marquise diamond

This 1.28ct lab-grown marquise sits in the one-and-a-quarter to one-and-a-half carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG845654640 or 845654640. Listed at 8 retailers as of November 5, 2026, with prices from $426 to $1,728, a $1,303 spread on the same certified stone. Brilliant Earth lists it at $1,728. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.28
Carat
G
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle41.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG845654640
Dimensions11.64 × 5.71 × 3.52 mm
L/W Ratio2.04
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.64 mm5.71 mm1.28 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG845654640
Side View
Table 61.0%Crown 34.5°Girdle: THN-MEDPavilion 41.4°Culet: NoneDepth 61.6%

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: $1,728 AUD|Low: $387 AUD|High: $1,728 AUD|Avg: $764 AUD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 5, 2026
Retailer 2$426 AUD
Retailer 8$546 AUD
Retailer 7$609 AUD
Retailer 4$636 AUD
Retailer 3$691 AUD
Retailer 6$1,131 AUD
Retailer 5$1,204 AUD
Brilliant Earth$1,728 AUD

6 data points across 8 retailers

8 retailers$426 AUD to $1,728 AUD

A
Cheapest Retailer
-
$426 AUD
A
Retailer 2
-
$546 AUD
View
A
Retailer 3
-
$609 AUD
View
A
Retailer 4
-
$636 AUD
View
A
Retailer 5
-
$691 AUD
View
B
Retailer 6
-
$1,131 AUD
View
B
Retailer 7
-
$1,204 AUD
View
Most Expensive
B
Brilliant Earth
22391645A · Nov 5
$1,728 AUD
$1,210 USD
View
7 more retailers have this diamond
Prices start from $426 AUDSave up to $1,303 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 Marquise
$426 AUD