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4.21ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 1563166259

Certificate GIA 1563166259

Diamond specifications and retailer prices

From HK$324,677 HKD
ZAR 668,585 ZAR
As of November 6, 2026
1 retailer carries this diamond
Only listing: HK$324,677 HKD at Cape Diamonds
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
View at Cape Diamonds

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 1563166259. Listed at a single retailer as of November 6, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. 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
FluorescenceNone
Crown angle36.5°
OriginNatural
Grading LabGIA
CertificateGIA 1563166259
Dimensions10.25 × 10.29 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizeNone
Top View
10.25 mm10.29 mm4.21 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1563166259
Side View
Table 57.0%Crown 36.5°Girdle: MED-STKPavilionCuletDepth 62.8%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: HK$324,677 HKD|Low: HK$324,677 HKD|High: HK$326,935 HKD|Avg: HK$325,603 HKD|-0.2%
November 6, 2026
Cape DiamondsHK$324,677 HKD

3 data points across 1 retailer

1 retailer

B+
Cape Diamonds
cert_1563166259 · Nov 6
HK$324,677 HKD
ZAR 668,585 ZAR
View

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B+
4.21ct Round
HK$324,677 HKD