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Marquise|Natural|IGI

0.31ct I SI1 Marquise Natural Diamond

VG • I/SI1 • IGI 839660312

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 839660312

Diamond specifications and retailer prices

From $395 AUD
$277 USD
As of October 29, 2026
Save $524 AUD (57%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $919 AUD at MOH London · As of October 29, 2026
View at MOH London

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 SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 839660312. Listed at 8 retailers as of October 29, 2026, with prices from $395 to $919, a $524 spread on the same certified stone. MOH London lists it at $919. 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
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle37.1°
Pavilion angle37.9°
OriginNatural
Grading LabIGI
CertificateIGI 839660312
Dimensions7.18 × 3.46 × 2.18 mm
L/W Ratio2.08
Girdle conditionFaceted
Top View
7.18 mm3.46 mm0.31 ctI / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI 839660312
Side View
Table 54.0%Crown 37.1°Girdle: STK-THKPavilion 37.9°Culet: NoneDepth 63.0%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: $919 AUD|Low: $395 AUD|High: $1,794 AUD|Avg: $748 AUD|-0.8%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 2, 2026
Retailer 6$395 AUD
Retailer 5$442 AUD
Retailer 7$551 AUD
Retailer 8$616 AUD
Retailer 2$688 AUD
Retailer 3$804 AUD
MOH London$919 AUD
Retailer 4$1,794 AUD

25 data points across 8 retailers

8 retailers$395 AUD to $919 AUD

B+
Cheapest Retailer
-
$395 AUD
$277 USD
B+
Retailer 2
-
$442 AUD
$310 USD
View
B
Retailer 3
-
$551 AUD
$386 USD
View
B
Retailer 4
-
$616 AUD
$432 USD
View
B
Retailer 5
-
$688 AUD
€459 EUR
View
B
Retailer 6
-
$804 AUD
£444 GBP
View
Most Expensive
C
MOH London
5D5B9DDD1 · Oct 29
$919 AUD
£507 GBP
View
6 more retailers have this diamond
Prices start from $395 AUDSave up to $524 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.

B+
0.31ct Marquise
$395 AUD