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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 $17,424 USD
As of November 4, 2026
Save $6,026 USD (26%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $23,450 USD 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 4, 2026, with prices from $17,424 to $23,450, a $6,026 spread on the same certified stone. Yorxs lists it at $23,450. 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
Color
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 4
Current: $21,940 USD|Low: $17,424 USD|High: $24,843 USD|Avg: $21,676 USD|-5.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Yorxs
November 6, 2026
Retailer 3$17,424 USD
Retailer 4$18,652 USD
Retailer 2$20,888 USD
Retailer 1$21,940 USD
Yorxs$23,450 USD

37 data points across 5 retailers

7 retailers$17,424 USD to $23,450 USD

A
Cheapest Retailer
-
$17,424 USD
A
Retailer 2
-
$18,652 USD
View
B+
Retailer 3
-
$20,888 USD
View
B+
Retailer 4
-
$21,940 USD
View
Retailer 5
-
$22,093 USD
View
Price last confirmed 16 days ago
Retailer 6
-
$22,093 USD
View
Price last confirmed 28 days ago
Most Expensive
B+
Yorxs
BM25735 · Nov 5
$23,450 USD
€22,333 EUR
View
6 more retailers have this diamond
Prices start from $17,424 USDSave up to $6,026 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
$17,424 USD