Round|Natural|GIA

4.21ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 2231859024

Certificate GIA 2231859024

Diamond specifications and retailer prices

From $41,694 CAD
As of November 4, 2026
Save $14,569 CAD (26%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $81,804 CAD at MOH London · As of October 21, 2026
View at MOH London

About this 4.21ct natural round diamond

This 4.21ct natural round sits in the three to five carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2231859024. Listed at 21 retailers as of November 4, 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

4.21
Carat
K
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2231859024
Dimensions10.31 × 10.24 × 6.42 mm
L/W Ratio1.01
Top View
10.31 mm10.24 mm4.21 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2231859024
Side View
Table 58.0%Crown 35.5°Girdle: Med. - Sli. ThickPavilion 41°Culet: NoneDepth 62.5%

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: Nov 4
Current: $81,804 CAD|Low: $40,257 CAD|High: $82,349 CAD|Avg: $53,332 CAD|-0.4%
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
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Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
Retailer 21
Retailer 22
November 6, 2026
Retailer 15$40,257 CAD
Retailer 19$41,694 CAD
Retailer 20$42,350 CAD
Retailer 13$43,508 CAD
Retailer 22$44,060 CAD
Retailer 21$44,906 CAD
Retailer 7$45,690 CAD
Retailer 17$46,436 CAD
Retailer 11$47,433 CAD
Retailer 14$50,557 CAD
Retailer 2$51,456 CAD
Retailer 4$52,100 CAD
Retailer 3$54,209 CAD
Retailer 6$54,270 CAD
Retailer 9$54,270 CAD
Retailer 12$55,713 CAD
Retailer 16$56,263 CAD
Retailer 10$56,441 CAD
Retailer 8$58,613 CAD
Retailer 5$64,024 CAD
Retailer 18$65,551 CAD
MOH London$81,804 CAD

25 data points across 22 retailers

21 retailers$41,694 CAD to $56,263 CAD

A
Cheapest Retailer
-
$41,694 CAD
A
Retailer 2
-
$42,350 CAD
View
A
Retailer 3
-
$43,508 CAD
View
A
Retailer 4
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$44,060 CAD
View
A
Retailer 5
-
$44,906 CAD
View
Retailer 6
-
$45,690 CAD
View
Price last confirmed 16 days ago
A
Retailer 7
-
$46,436 CAD
View
Retailer 8
-
$47,433 CAD
View
Price last confirmed 14 days ago
Retailer 9
-
$50,557 CAD
View
Price last confirmed 13 days ago
B+
Retailer 10
-
$51,456 CAD
View
Retailer 11
-
$52,100 CAD
View
Price last confirmed 13 days ago
Retailer 12
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$54,270 CAD
View
Price last confirmed 14 days ago
Retailer 13
-
$54,270 CAD
View
Price last confirmed 15 days ago
Retailer 14
-
$55,713 CAD
View
Price last confirmed 23 days ago
B+
Retailer 15
-
$56,263 CAD
View
Retailer 16
-
$56,441 CAD
View
Price last confirmed 15 days ago
Retailer 17
-
$58,613 CAD
View
Price last confirmed 14 days ago
Retailer 18
-
$62,847 CAD
View
Price last confirmed 13 days ago
Retailer 19
-
$64,024 CAD
View
Price last confirmed 15 days ago
Retailer 20
-
$65,551 CAD
View
Price last confirmed 9 days ago
Most Expensive
MOH London
620BE549C · Oct 21
$81,804 CAD
£46,121 GBP
View
Price last confirmed 16 days ago
20 more retailers have this diamond
Prices start from $41,694 CADSave up to $14,569 CAD

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
4.21ct Round
$41,694 CAD