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Marquise|Lab Grown|IGI

1.28ct D SI1 Marquise Lab Grown Diamond

VG • D/SI1 • IGI LG843658870

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG843658870

Diamond specifications and retailer prices

From $354 AUD
£195 GBP
As of November 2, 2026
Save $1,029 AUD (74%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $1,383 AUD at MOH London · As of November 1, 2026
View at MOH London

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 D colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG843658870 or 843658870. Listed at 7 retailers as of November 1, 2026, with prices from $354 to $1,383, a $1,029 spread on the same certified stone. MOH London lists it at $1,383. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.28
Carat
D
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG843658870
Dimensions11.23 × 5.69 × 3.53 mm
L/W Ratio1.97
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.23 mm5.69 mm1.28 ctD / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG843658870
Side View
Table 59.0%Crown 35.2°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.0%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $1,383 AUD|Low: $354 AUD|High: $1,826 AUD|Avg: $859 AUD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 2$354 AUD
Retailer 3$521 AUD
Retailer 6$532 AUD
Retailer 7$686 AUD
Retailer 5$1,005 AUD
Retailer 4$1,284 AUD
MOH London$1,383 AUD

12 data points across 7 retailers

7 retailers$354 AUD to $1,383 AUD

A
Cheapest Retailer
-
$354 AUD
£195 GBP
A
Retailer 2
-
$521 AUD
£288 GBP
View
B+
Retailer 3
-
$532 AUD
$373 USD
View
B+
Retailer 4
-
$686 AUD
$481 USD
View
B
Retailer 5
-
$1,005 AUD
$704 USD
View
B
Retailer 6
-
$1,284 AUD
$900 USD
View
Most Expensive
B
MOH London
LG843658870 · Nov 1
$1,383 AUD
£763 GBP
View
6 more retailers have this diamond
Prices start from $354 AUDSave up to $1,029 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
$354 AUD