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Round|Natural|GIA

3.21ct K SI2 Round Natural Diamond

EX • K/SI2 • GIA 2151974747

Certificate GIA 2151974747

Diamond specifications and retailer prices

From £12,946 GBP
As of November 6, 2026
Save £4,477 GBP (26%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £17,423 GBP at Yorxs · As of November 5, 2026
View at Yorxs

About this 3.21ct natural round diamond

This 3.21ct natural round sits in the three to five carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2151974747. Listed at 7 retailers as of November 5, 2026, with prices from £12,946 to £17,423, a £4,477 spread on the same certified stone. Yorxs lists it at £17,423. 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
K
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2151974747
Dimensions9.48 × 9.51 × 5.80 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
Additional twinning wisps, clouds, internal graining and surface graining are not shown.
Top View
9.48 mm9.51 mm3.21 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2151974747
Side View
Table 58.0%Crown 35°Girdle: MediumPavilion 40.8°CuletDepth 61.1%

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: Nov 6
Current: £16,301 GBP|Low: £12,946 GBP|High: £18,458 GBP|Avg: £16,105 GBP|-5.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Yorxs
November 6, 2026
Retailer 3£12,946 GBP
Retailer 4£13,858 GBP
Retailer 2£15,520 GBP
Retailer 1£16,301 GBP
Yorxs£17,423 GBP

37 data points across 5 retailers

7 retailers£12,946 GBP to £17,423 GBP

A
Cheapest Retailer
-
£12,946 GBP
A
Retailer 2
-
£13,858 GBP
View
B+
Retailer 3
-
£15,520 GBP
View
B+
Retailer 4
-
£16,301 GBP
View
Retailer 5
-
£16,415 GBP
View
Price last confirmed 16 days ago
Retailer 6
-
£16,415 GBP
View
Price last confirmed 28 days ago
Most Expensive
B+
Yorxs
BM25735 · Nov 5
£17,423 GBP
€22,333 EUR
View
6 more retailers have this diamond
Prices start from £12,946 GBPSave up to £4,477 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
£12,946 GBP