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Marquise|Natural|IGI

0.31ct I SI1 Marquise Natural Diamond

VG • I/SI1 • IGI 839657974

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 839657974

Diamond specifications and retailer prices

From $354 SGD
$277 USD
As of October 29, 2026
Save $469 SGD (57%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $823 SGD 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 839657974. Listed at 8 retailers as of October 29, 2026, with prices from $354 to $823, a $469 spread on the same certified stone. MOH London lists it at $823. 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 angle30.6°
Pavilion angle40.3°
OriginNatural
Grading LabIGI
CertificateIGI 839657974
Dimensions7.39 × 3.33 × 2.17 mm
L/W Ratio2.22
Girdle conditionFaceted
Top View
7.39 mm3.33 mm0.31 ctI / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI 839657974
Side View
Table 52.0%Crown 30.6°Girdle: STK-THKPavilion 40.3°Culet: NoneDepth 65.2%

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: $823 SGD|Low: $354 SGD|High: $1,607 SGD|Avg: $705 SGD|+0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 2, 2026
Retailer 4$354 SGD
Retailer 8$396 SGD
Retailer 5$494 SGD
Retailer 7$552 SGD
Retailer 2$616 SGD
Retailer 3$720 SGD
MOH London$823 SGD
Retailer 6$1,607 SGD

13 data points across 8 retailers

8 retailers$354 SGD to $823 SGD

B+
Cheapest Retailer
-
$354 SGD
$277 USD
B+
Retailer 2
-
$396 SGD
$310 USD
View
B
Retailer 3
-
$494 SGD
$386 USD
View
B
Retailer 4
-
$552 SGD
$432 USD
View
B
Retailer 5
-
$616 SGD
€459 EUR
View
C
Retailer 6
-
$720 SGD
£444 GBP
View
Most Expensive
C
MOH London
9C1C28148 · Oct 29
$823 SGD
£507 GBP
View
6 more retailers have this diamond
Prices start from $354 SGDSave up to $469 SGD

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
$354 SGD