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Marquise|Natural|IGI

0.31ct I SI1 Marquise Natural Diamond

VG • I/SI1 • IGI 839660376

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 839660376

Diamond specifications and retailer prices

From £207 GBP
$277 USD
As of October 29, 2026
Save £272 GBP (57%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £479 GBP at MOH London · As of October 26, 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 839660376. Listed at 8 retailers as of October 26, 2026, with prices from £207 to £479, a £272 spread on the same certified stone. MOH London lists it at £479. 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 angle33.8°
Pavilion angle38.4°
OriginNatural
Grading LabIGI
CertificateIGI 839660376
Dimensions7.46 × 3.40 × 2.13 mm
L/W Ratio2.19
Girdle conditionFaceted
Top View
7.46 mm3.40 mm0.31 ctI / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI 839660376
Side View
Table 60.0%Crown 33.8°Girdle: MED-THKPavilion 38.4°Culet: NoneDepth 62.6%

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: £479 GBP|Low: £207 GBP|High: £938 GBP|Avg: £391 GBP|-1.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 2, 2026
Retailer 6£207 GBP
Retailer 5£231 GBP
Retailer 7£288 GBP
Retailer 8£322 GBP
Retailer 2£360 GBP
Retailer 3£420 GBP
MOH London£479 GBP
Retailer 4£938 GBP

23 data points across 8 retailers

8 retailers£207 GBP to £479 GBP

B+
Cheapest Retailer
-
£207 GBP
$277 USD
B+
Retailer 2
-
£231 GBP
$310 USD
View
B
Retailer 3
-
£288 GBP
$386 USD
View
B
Retailer 4
-
£322 GBP
$432 USD
View
B
Retailer 5
-
£360 GBP
€459 EUR
View
B
Retailer 6
-
£420 GBP
View
Most Expensive
C
MOH London
8FD1A9C1E · Oct 26
£479 GBP
View
6 more retailers have this diamond
Prices start from £207 GBPSave up to £272 GBP

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
£207 GBP