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Marquise|Natural|IGI

0.40ct I SI2 Marquise Natural Diamond

VG • I/SI2 • IGI 839660292

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 839660292

Diamond specifications and retailer prices

From $429 AUD
$301 USD
As of October 29, 2026
Save $569 AUD (57%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $1,946 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 SI2 clarity (slightly-included), with a very-good cut grade and certified by IGI 839660292. Listed at 8 retailers as of October 29, 2026, with a 132% 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
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle35.3°
Pavilion angle38.7°
OriginNatural
Grading LabIGI
CertificateIGI 839660292
Dimensions7.57 × 3.86 × 2.29 mm
L/W Ratio1.96
Girdle conditionFaceted
Culet sizeNone
Top View
7.57 mm3.86 mm0.40 ctI / SI2
OriginNatural
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI 839660292
Side View
Table 60.0%Crown 35.3°Girdle: MED-THKPavilion 38.7°Culet: NoneDepth 59.3%

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: $1,946 AUD|Low: $429 AUD|High: $1,946 AUD|Avg: $811 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 2, 2026
Retailer 6$429 AUD
Retailer 5$479 AUD
Retailer 8$607 AUD
Retailer 7$651 AUD
Retailer 2$743 AUD
Retailer 3$873 AUD
Retailer 4$999 AUD
NZ Jewellers$1,946 AUD

24 data points across 8 retailers

8 retailers$429 AUD to $999 AUD

A
Cheapest Retailer
-
$429 AUD
$301 USD
B+
Retailer 2
-
$479 AUD
$336 USD
View
B+
Retailer 3
-
$607 AUD
$425 USD
View
B
Retailer 4
-
$651 AUD
$456 USD
View
B
Retailer 5
-
$743 AUD
€496 EUR
View
B
Retailer 6
-
$873 AUD
£481 GBP
View
B
Retailer 7
-
$999 AUD
£551 GBP
View
Most Expensive
NZ Jewellers
ea1b4425-9cce-4bb9-a94a-5b040745bd7d · Oct 30
$1,946 AUD
$1,364 USD
View
Price under review
7 more retailers have this diamond
Prices start from $429 AUDSave up to $569 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
$429 AUD