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Round|Natural|IGI

3.21ct J SI1 Round Natural Diamond

EX • J/SI1 • IGI 826667269

Shape and cutting style on the report: Round brilliant

Certificate IGI 826667269

Diamond specifications and retailer prices

From $18,706 AUD
$13,140 USD
As of October 31, 2026
Save $10,218 AUD (35%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $28,924 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 J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 826667269. Listed at 17 retailers as of October 31, 2026, with prices from $18,706 to $28,924, a $10,218 spread on the same certified stone. MOH London lists it at $28,924. 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
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle35.9°
Pavilion angle40.7°
OriginNatural
Grading LabIGI
CertificateIGI 826667269
Dimensions9.37 × 9.41 × 5.85 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizeNone
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
9.37 mm9.41 mm3.21 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 826667269
Side View
Table 57.0%Crown 35.9°Girdle: MediumPavilion 40.7°Culet: NoneDepth 62.3%

Caratlytics Score

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

Price History

Last verified: Oct 31
Current: $28,924 AUD|Low: $18,706 AUD|High: $30,341 AUD|Avg: $22,295 AUD|-4.7%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 2, 2026
Retailer 14$18,706 AUD
Retailer 13$18,793 AUD
Retailer 12$19,590 AUD
Retailer 2$19,914 AUD
Retailer 3$20,059 AUD
Retailer 8$20,280 AUD
Retailer 4$20,443 AUD
Retailer 11$21,805 AUD
Retailer 6$22,146 AUD
Retailer 5$22,701 AUD
Retailer 7$22,997 AUD
Retailer 9$23,230 AUD
Retailer 10$24,007 AUD
Retailer 15$26,236 AUD
MOH London$28,924 AUD

35 data points across 15 retailers

17 retailers$18,706 AUD to $28,924 AUD

A
Cheapest Retailer
-
$18,706 AUD
$13,140 USD
A
Retailer 2
-
$18,793 AUD
$13,201 USD
View
A
Retailer 3
-
$19,590 AUD
$13,761 USD
View
Final sale: no returns
A
Retailer 4
-
$19,914 AUD
£11,015 GBP
View
A
Retailer 5
-
$20,059 AUD
$14,090 USD
View
A
Retailer 6
-
$20,280 AUD
£11,217 GBP
View
A
Retailer 7
-
$20,443 AUD
$14,360 USD
View
A
Retailer 8
-
$21,805 AUD
$15,317 USD
View
A
Retailer 9
-
$22,146 AUD
$15,556 USD
View
A
Retailer 10
-
$22,701 AUD
$15,946 USD
View
Retailer 11
-
$22,997 AUD
$16,154 USD
View
Price last confirmed 63 days ago
A
Retailer 12
-
$22,997 AUD
$16,154 USD
View
A
Retailer 13
-
$23,230 AUD
€15,541 EUR
View
A
Retailer 14
-
$24,007 AUD
ZAR 272,433 ZAR
View
B+
Retailer 15
-
$26,236 AUD
$18,429 USD
View
Retailer 16
-
$26,236 AUD
$18,429 USD
View
Price last confirmed 64 days ago
Most Expensive
A
MOH London
15A73A5D1 · Nov 1
$28,924 AUD
£15,998 GBP
View
16 more retailers have this diamond
Prices start from $18,706 AUDSave up to $10,218 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
$18,706 AUD