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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 $13,140 USD
As of October 30, 2026
Save $7,285 USD (36%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $20,425 USD at MOH London · As of October 29, 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 29, 2026, with prices from $13,140 to $20,425, a $7,285 spread on the same certified stone. MOH London lists it at $20,425. 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
Color
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 30
Current: $20,425 USD|Low: $13,140 USD|High: $21,313 USD|Avg: $15,639 USD|-4.2%
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
October 31, 2026
Retailer 14$13,140 USD
Retailer 13$13,201 USD
Retailer 12$13,761 USD
Retailer 2$13,989 USD
Retailer 3$14,090 USD
Retailer 8$14,288 USD
Retailer 4$14,360 USD
Retailer 11$15,317 USD
Retailer 6$15,556 USD
Retailer 5$15,946 USD
Retailer 7$16,154 USD
Retailer 9$16,435 USD
Retailer 10$16,774 USD
Retailer 15$18,429 USD
MOH London$20,425 USD

35 data points across 15 retailers

17 retailers$13,140 USD to $20,425 USD

A
Cheapest Retailer
-
$13,140 USD
A
Retailer 2
-
$13,201 USD
View
A
Retailer 3
-
$13,761 USD
View
Final sale: no returns
A
Retailer 4
-
$13,989 USD
£11,015 GBP
View
A
Retailer 5
-
$14,090 USD
View
A
Retailer 6
-
$14,288 USD
£11,251 GBP
View
A
Retailer 7
-
$14,360 USD
View
A
Retailer 8
-
$15,317 USD
View
A
Retailer 9
-
$15,556 USD
View
A
Retailer 10
-
$15,946 USD
View
Retailer 11
-
$16,154 USD
View
Price last confirmed 61 days ago
A
Retailer 12
-
$16,154 USD
View
A
Retailer 13
-
$16,435 USD
€15,652 EUR
View
A
Retailer 14
-
$16,774 USD
ZAR 270,985 ZAR
View
B+
Retailer 15
-
$18,429 USD
View
Retailer 16
-
$18,429 USD
View
Price last confirmed 63 days ago
Most Expensive
A
MOH London
15A73A5D1 · Oct 29
$20,425 USD
£16,083 GBP
View
16 more retailers have this diamond
Prices start from $13,140 USDSave up to $7,285 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
3.21ct Round
$13,140 USD