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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 $405 NZD
$228 USD
As of October 29, 2026
Save $536 NZD (57%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $1,834 NZD 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: $1,834 NZD|Low: $405 NZD|High: $1,834 NZD|Avg: $809 NZD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 2, 2026
Retailer 5$405 NZD
Retailer 8$451 NZD
Retailer 6$550 NZD
Retailer 7$691 NZD
Retailer 2$722 NZD
Retailer 3$822 NZD
Retailer 4$941 NZD
NZ Jewellers$1,834 NZD

12 data points across 8 retailers

8 retailers$405 NZD to $941 NZD

A
Cheapest Retailer
-
$405 NZD
$228 USD
B+
Retailer 2
-
$451 NZD
$254 USD
View
B+
Retailer 3
-
$550 NZD
$309 USD
View
B
Retailer 4
-
$691 NZD
$389 USD
View
B
Retailer 5
-
$722 NZD
€387 EUR
View
B
Retailer 6
-
$822 NZD
£364 GBP
View
C
Retailer 7
-
$941 NZD
£417 GBP
View
Most Expensive
NZ Jewellers
ba28f784-f48d-43af-801b-f98a616d1420 · Oct 30
$1,834 NZD
$1,032 USD
View
Price under review
7 more retailers have this diamond
Prices start from $405 NZDSave up to $536 NZD

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
$405 NZD