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Round|Natural|GIA

4.21ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 2231859024

Certificate GIA 2231859024

Diamond specifications and retailer prices

From $38,133 SGD
As of November 6, 2026
Save $13,325 SGD (26%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $74,816 SGD 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 5, 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
Colour
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 6
Current: $74,816 SGD|Low: $36,818 SGD|High: $75,314 SGD|Avg: $48,776 SGD|-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
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
Retailer 21
Retailer 22
November 6, 2026
Retailer 15$36,818 SGD
Retailer 19$38,133 SGD
Retailer 20$38,733 SGD
Retailer 13$39,792 SGD
Retailer 22$40,296 SGD
Retailer 21$41,070 SGD
Retailer 7$41,787 SGD
Retailer 17$42,469 SGD
Retailer 11$43,381 SGD
Retailer 14$46,238 SGD
Retailer 2$47,061 SGD
Retailer 4$47,650 SGD
Retailer 3$49,578 SGD
Retailer 6$49,635 SGD
Retailer 9$49,635 SGD
Retailer 12$50,954 SGD
Retailer 16$51,457 SGD
Retailer 10$51,620 SGD
Retailer 8$53,606 SGD
Retailer 5$58,555 SGD
Retailer 18$59,951 SGD
MOH London$74,816 SGD

25 data points across 22 retailers

21 retailers$38,133 SGD to $51,457 SGD

A
Cheapest Retailer
-
$38,133 SGD
A
Retailer 2
-
$38,733 SGD
View
A
Retailer 3
-
$39,792 SGD
View
A
Retailer 4
-
$40,296 SGD
View
A
Retailer 5
-
$41,070 SGD
View
Retailer 6
-
$41,787 SGD
View
Price last confirmed 16 days ago
A
Retailer 7
-
$42,469 SGD
View
Retailer 8
-
$43,381 SGD
View
Price last confirmed 14 days ago
Retailer 9
-
$46,238 SGD
View
Price last confirmed 13 days ago
B+
Retailer 10
-
$47,061 SGD
View
Retailer 11
-
$47,650 SGD
View
Price last confirmed 13 days ago
Retailer 12
-
$49,635 SGD
View
Price last confirmed 14 days ago
Retailer 13
-
$49,635 SGD
View
Price last confirmed 15 days ago
Retailer 14
-
$50,954 SGD
View
Price last confirmed 23 days ago
B+
Retailer 15
-
$51,457 SGD
View
Retailer 16
-
$51,620 SGD
View
Price last confirmed 15 days ago
Retailer 17
-
$53,606 SGD
View
Price last confirmed 14 days ago
Retailer 18
-
$57,479 SGD
View
Price last confirmed 13 days ago
Retailer 19
-
$58,555 SGD
View
Price last confirmed 15 days ago
Retailer 20
-
$59,951 SGD
View
Price last confirmed 9 days ago
Most Expensive
MOH London
620BE549C · Oct 21
$74,816 SGD
£46,121 GBP
View
Price last confirmed 16 days ago
20 more retailers have this diamond
Prices start from $38,133 SGDSave up to $13,325 SGD

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
$38,133 SGD