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Marquise|Natural|IGI

0.31ct I SI2 Marquise Natural Diamond

VG • I/SI2 • IGI 839657990

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 839657990

Diamond specifications and retailer prices

From $325 AUD
$228 USD
As of October 29, 2026
Save $430 AUD (57%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $1,473 AUD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 0.31ct natural marquise diamond

This 0.31ct 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 839657990. 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

0.31
Carat
I
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle35.6°
Pavilion angle39.1°
OriginNatural
Grading LabIGI
CertificateIGI 839657990
Dimensions7.43 × 3.42 × 2.12 mm
L/W Ratio2.17
Girdle conditionFaceted
Top View
7.43 mm3.42 mm0.31 ctI / SI2
OriginNatural
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI 839657990
Side View
Table 58.0%Crown 35.6°Girdle: MED-THKPavilion 39.1°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: Oct 29
Current: $1,473 AUD|Low: $325 AUD|High: $1,473 AUD|Avg: $649 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 2, 2026
Retailer 5$325 AUD
Retailer 8$362 AUD
Retailer 6$442 AUD
Retailer 7$555 AUD
Retailer 2$580 AUD
Retailer 3$660 AUD
Retailer 4$756 AUD
NZ Jewellers$1,473 AUD

12 data points across 8 retailers

8 retailers$325 AUD to $756 AUD

A
Cheapest Retailer
-
$325 AUD
$228 USD
B+
Retailer 2
-
$362 AUD
$254 USD
View
B+
Retailer 3
-
$442 AUD
$309 USD
View
B
Retailer 4
-
$555 AUD
$389 USD
View
B
Retailer 5
-
$580 AUD
€387 EUR
View
B
Retailer 6
-
$660 AUD
£364 GBP
View
C
Retailer 7
-
$756 AUD
£417 GBP
View
Most Expensive
NZ Jewellers
ba28f784-f48d-43af-801b-f98a616d1420 · Oct 30
$1,473 AUD
$1,032 USD
View
Price under review
7 more retailers have this diamond
Prices start from $325 AUDSave up to $430 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
0.31ct Marquise
$325 AUD