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3.21ct J SI2 Round Natural Diamond

EX • J/SI2 • IGI 462143258

Shape and cutting style on the report: Round brilliant

Certificate IGI 462143258

Diamond specifications and retailer prices

From £12,806 GBP
$17,158 USD
As of October 30, 2026
Save £4,506 GBP (26%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £23,331 GBP at MOH London · As of October 5, 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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 462143258. Listed at 3 retailers as of October 29, 2026, with a 35% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle40.9°
OriginNatural
Grading LabIGI
CertificateIGI 462143258
Dimensions9.62 × 9.64 × 5.71 mm
L/W Ratio1.00
Culet sizePointed
Top View
9.62 mm9.64 mm3.21 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 462143258
Side View
Table 60.5%Crown 33.7°Girdle: THN-MEDPavilion 40.9°Culet: NoneDepth 59.3%

Caratlytics Score

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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: £23,331 GBP|Low: £12,680 GBP|High: £23,331 GBP|Avg: £17,528 GBP|+1.1%
MOH London
Retailer 2
Retailer 3
October 29, 2026
Retailer 3£12,806 GBP
Retailer 2£17,312 GBP
MOH London£23,331 GBP

25 data points across 3 retailers

3 retailers£12,806 GBP to £17,312 GBP

A
Cheapest Retailer
-
£12,806 GBP
$17,158 USD
B+
Retailer 2
-
£17,312 GBP
€22,091 EUR
View
Most Expensive
MOH London
DB05FCFF1 · Oct 5
£23,331 GBP
View
Price last confirmed 26 days ago
2 more retailers have this diamond
Prices start from £12,806 GBPSave up to £4,506 GBP

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
£12,806 GBP