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Marquise|Natural|IGI

0.31ct I SI1 Marquise Natural Diamond

VG • I/SI1 • IGI 839656774

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 839656774

Diamond specifications and retailer prices

From €218 EUR
$245 USD
As of October 29, 2026
Save €288 EUR (57%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: €506 EUR 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 839656774. Listed at 8 retailers as of October 29, 2026, with prices from €218 to €506, a €288 spread on the same certified stone. MOH London lists it at €506. 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
Color
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryGood
FluorescenceNone
Crown angle30.4°
Pavilion angle39.1°
OriginNatural
Grading LabIGI
CertificateIGI 839656774
Dimensions7.18 × 3.53 × 2.03 mm
L/W Ratio2.03
Girdle conditionFaceted
Top View
7.18 mm3.53 mm0.31 ctI / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryGood
FluorescenceNone
CertificateIGI 839656774
Side View
Table 65.0%Crown 30.4°Girdle: MED-THKPavilion 39.1°Culet: NoneDepth 57.5%

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: €506 EUR|Low: €218 EUR|High: €988 EUR|Avg: €427 EUR|+0.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 2, 2026
Retailer 4€218 EUR
Retailer 8€243 EUR
Retailer 5€301 EUR
Retailer 7€359 EUR
Retailer 2€387 EUR
Retailer 3€443 EUR
MOH London€506 EUR
Retailer 6€988 EUR

13 data points across 8 retailers

8 retailers€218 EUR to €506 EUR

B+
Cheapest Retailer
-
€218 EUR
$245 USD
B+
Retailer 2
-
€243 EUR
$273 USD
View
B
Retailer 3
-
€301 EUR
$337 USD
View
B
Retailer 4
-
€359 EUR
$403 USD
View
B
Retailer 5
-
€387 EUR
View
B
Retailer 6
-
€443 EUR
£391 GBP
View
Most Expensive
C
MOH London
5A3CC6575 · Oct 29
€506 EUR
£447 GBP
View
6 more retailers have this diamond
Prices start from €218 EURSave up to €288 EUR

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
€218 EUR