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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 $277 AUD
₹18,512 INR
As of November 2, 2026
Save $620 AUD (69%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $897 AUD at MOH London · As of November 2, 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 2, 2026, with prices from $277 to $897, a $620 spread on the same certified stone. MOH London lists it at $897. 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
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 2
Current: $897 AUD|Low: $277 AUD|High: $908 AUD|Avg: $571 AUD|-0.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 2$277 AUD
Retailer 6$419 AUD
Retailer 4$510 AUD
Retailer 5$602 AUD
Retailer 7$634 AUD
Retailer 3$667 AUD
MOH London$897 AUD

45 data points across 7 retailers

8 retailers$277 AUD to $897 AUD

A
Cheapest Retailer
-
$277 AUD
₹18,512 INR
B+
Retailer 2
-
$419 AUD
$294 USD
View
B
Retailer 3
-
$510 AUD
£282 GBP
View
B
Retailer 4
-
$574 AUD
$403 USD
View
B
Retailer 5
-
$602 AUD
ZAR 6,832 ZAR
View
B
Retailer 6
-
$634 AUD
$445 USD
View
B
Retailer 7
-
$667 AUD
€446 EUR
View
Most Expensive
C
MOH London
17B5F47BD · Nov 2
$897 AUD
£496 GBP
View
7 more retailers have this diamond
Prices start from $277 AUDSave up to $620 AUD

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
$277 AUD