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 $245 USD
As of October 29, 2026
Save $323 USD (57%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $568 USD 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 $245 to $568, a $323 spread on the same certified stone. MOH London lists it at $568. 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: $568 USD|Low: $245 USD|High: $1,108 USD|Avg: $479 USD|+0.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 2, 2026
Retailer 4$245 USD
Retailer 8$273 USD
Retailer 5$337 USD
Retailer 7$403 USD
Retailer 2$434 USD
Retailer 3$497 USD
MOH London$568 USD
Retailer 6$1,108 USD

13 data points across 8 retailers

8 retailers$245 USD to $568 USD

B+
Cheapest Retailer
-
$245 USD
B+
Retailer 2
-
$273 USD
View
B
Retailer 3
-
$337 USD
View
B
Retailer 4
-
$403 USD
View
B
Retailer 5
-
$434 USD
€413 EUR
View
B
Retailer 6
-
$497 USD
£391 GBP
View
Most Expensive
C
MOH London
5A3CC6575 · Oct 29
$568 USD
£447 GBP
View
6 more retailers have this diamond
Prices start from $245 USDSave up to $323 USD

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
$245 USD