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4.51ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 5221224621

Certificate GIA 5221224621

Diamond specifications and retailer prices

From HK$598,752 HKD
$76,316 USD
As of October 31, 2026
Save HK$107,020 HKD (15%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: HK$705,773 HKD at Yorxs · As of November 1, 2026
View at Yorxs

About this 4.51ct natural round diamond

This 4.51ct natural round sits in the three to five carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5221224621. Listed at 5 retailers as of October 31, 2026, with prices from HK$598,752 to HK$705,773, a HK$107,020 spread on the same certified stone. Yorxs lists it at HK$705,773. 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

4.51
Carat
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle35.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 5221224621
Dimensions10.46 × 10.52 × 6.59 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
10.46 mm10.52 mm4.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 5221224621
Side View
Table 56.0%Crown 35.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 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: Oct 31
Current: HK$598,752 HKD|Low: HK$598,752 HKD|High: HK$710,765 HKD|Avg: HK$649,439 HKD
Retailer 1
Yorxs
November 1, 2026
Retailer 1HK$598,752 HKD
YorxsHK$705,773 HKD

23 data points across 2 retailers

5 retailersHK$598,752 HKD to HK$705,773 HKD

B+
Cheapest Retailer
-
HK$598,752 HKD
$76,316 USD
B
Retailer 2
-
HK$620,281 HKD
$79,060 USD
View
B
Retailer 3
-
HK$620,281 HKD
$79,060 USD
View
B
Retailer 4
-
HK$640,994 HKD
$81,700 USD
View
Most Expensive
B
Yorxs
511830329 · Nov 1
HK$705,773 HKD
€85,673 EUR
View
4 more retailers have this diamond
Prices start from HK$598,752 HKDSave up to HK$107,020 HKD

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.

B+
4.51ct Round
HK$598,752 HKD