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3.21ct H SI2 Round Natural Diamond

EX • H/SI2 • IGI 831624590

Shape and cutting style on the report: Round brilliant

Certificate IGI 831624590

Diamond specifications and retailer prices

From $27,027 AUD
$18,985 USD
As of October 29, 2026
Save $9,393 AUD (26%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $36,420 AUD at MOH London · As of November 1, 2026
View at MOH London

About this 3.21ct natural round diamond

This 3.21ct natural round sits in the three to five carat band, graded H colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 831624590. Listed at 6 retailers as of October 29, 2026, with prices from $27,027 to $36,420, a $9,393 spread on the same certified stone. MOH London lists it at $36,420. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

3.21
Carat
H
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36°
Pavilion angle40.7°
OriginNatural
Grading LabIGI
CertificateIGI 831624590
Dimensions9.36 × 9.43 × 5.84 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
9.36 mm9.43 mm3.21 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 831624590
Side View
Table 57.0%Crown 36°Girdle: MED-STKPavilion 40.7°CuletDepth 62.2%

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: Oct 29
Current: $36,420 AUD|Low: $27,027 AUD|High: $36,615 AUD|Avg: $30,201 AUD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 1, 2026
Retailer 5$27,027 AUD
Retailer 6$27,885 AUD
Retailer 3$29,511 AUD
Retailer 2$29,607 AUD
Retailer 4$33,036 AUD
MOH London$36,420 AUD

12 data points across 6 retailers

6 retailers$27,027 AUD to $36,420 AUD

A
Cheapest Retailer
-
$27,027 AUD
$18,985 USD
A
Retailer 2
-
$27,885 AUD
$19,588 USD
View
A
Retailer 3
-
$29,511 AUD
€19,743 EUR
View
A
Retailer 4
-
$29,607 AUD
£16,376 GBP
View
B+
Retailer 5
-
$33,036 AUD
$23,206 USD
View
Most Expensive
B+
MOH London
E5F6E9E8D · Nov 1
$36,420 AUD
£20,144 GBP
View
5 more retailers have this diamond
Prices start from $27,027 AUDSave up to $9,393 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
3.21ct Round
$27,027 AUD