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Marquise|Natural|IGI

0.31ct I SI1 Marquise Natural Diamond

VG • I/SI1 • IGI 810631802

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 810631802

Diamond specifications and retailer prices

From $194 USD
₹18,518 INR
As of November 1, 2026
Save $435 USD (69%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $630 USD at MOH London · As of November 1, 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 810631802. Listed at 8 retailers as of November 1, 2026, with prices from $194 to $630, a $435 spread on the same certified stone. MOH London lists it at $630. 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 angle32°
Pavilion angle39°
OriginNatural
Grading LabIGI
CertificateIGI 810631802
Dimensions7.12 × 3.60 × 2.12 mm
L/W Ratio1.98
Girdle conditionFaceted
Culet sizeNone
Top View
7.12 mm3.60 mm0.31 ctI / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryGood
FluorescenceNone
CertificateIGI 810631802
Side View
Table 57.0%Crown 32°Girdle: MED-THKPavilion 39°Culet: NoneDepth 58.9%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $630 USD|Low: $194 USD|High: $638 USD|Avg: $401 USD|-0.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 4$194 USD
Retailer 6$294 USD
Retailer 3$358 USD
Retailer 5$423 USD
Retailer 7$445 USD
Retailer 2$468 USD
MOH London$630 USD

46 data points across 7 retailers

8 retailers$194 USD to $630 USD

A
Cheapest Retailer
-
$194 USD
₹18,518 INR
B+
Retailer 2
-
$294 USD
View
B
Retailer 3
-
$358 USD
£282 GBP
View
B
Retailer 4
-
$403 USD
View
B
Retailer 5
-
$423 USD
ZAR 6,832 ZAR
View
B
Retailer 6
-
$445 USD
View
B
Retailer 7
-
$468 USD
€446 EUR
View
Most Expensive
C
MOH London
17B5F47BD · Nov 1
$630 USD
£496 GBP
View
7 more retailers have this diamond
Prices start from $194 USDSave up to $435 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.

A
0.31ct Marquise
$194 USD