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Marquise|Natural|IGI

0.40ct I SI1 Marquise Natural Diamond

VG • I/SI1 • IGI 823660750

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 823660750

Diamond specifications and retailer prices

From $455 AUD
$319 USD
As of October 29, 2026
Save $470 AUD (51%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $1,747 AUD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 0.4ct natural marquise diamond

This 0.4ct natural marquise sits in the sub-half-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 823660750. Listed at 9 retailers as of October 29, 2026, with a 103% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

0.40
Carat
I
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle33.9°
Pavilion angle40.7°
OriginNatural
Grading LabIGI
CertificateIGI 823660750
Dimensions7.36 × 3.92 × 2.41 mm
L/W Ratio1.88
Girdle conditionFaceted
Top View
7.36 mm3.92 mm0.40 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 823660750
Side View
Table 63.0%Crown 33.9°Girdle: STK-VTKPavilion 40.7°Culet: NoneDepth 61.5%

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: Oct 29
Current: $1,747 AUD|Low: $455 AUD|High: $1,865 AUD|Avg: $866 AUD|-6.4%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 7$455 AUD
Retailer 5$508 AUD
Retailer 9$651 AUD
Retailer 6$656 AUD
Retailer 8$672 AUD
Retailer 2$788 AUD
Retailer 3$925 AUD
Retailer 4$1,053 AUD
NZ Jewellers$1,747 AUD

41 data points across 9 retailers

9 retailers$455 AUD to $925 AUD

A
Cheapest Retailer
-
$455 AUD
$319 USD
A
Retailer 2
-
$508 AUD
$356 USD
View
B+
Retailer 3
-
$651 AUD
$456 USD
View
B+
Retailer 4
-
$656 AUD
$460 USD
View
B
Retailer 5
-
$672 AUD
$471 USD
View
B
Retailer 6
-
$788 AUD
€526 EUR
View
B
Retailer 7
-
$925 AUD
£510 GBP
View
Retailer 8
-
$1,053 AUD
£581 GBP
View
Price last confirmed 7 days ago
Most Expensive
NZ Jewellers
41a21492-8cfc-4f2b-92a4-e86a0160292c · Oct 30
$1,747 AUD
$1,224 USD
View
Price under review
8 more retailers have this diamond
Prices start from $455 AUDSave up to $470 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
0.40ct Marquise
$455 AUD