Round|Natural|GIA

4.25ct K SI1 Round Natural Diamond

EX • K/SI1

Diamond specifications and retailer prices

From HK$272,323 HKD
As of November 6, 2026
Save HK$67,022 HKD (20%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: HK$350,398 HKD at Aurelinne · As of October 23, 2026
View at Aurelinne

About this 4.25ct natural round diamond

This 4.25ct 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. Listed at 15 retailers as of November 6, 2026, with a relatively tight 25% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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

4.25
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
Dimensions10.31 × 10.40 × 6.40 mm
L/W Ratio1.01
Top View
10.31 mm10.40 mm4.25 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA
Side View
Table 60.0%CrownGirdle: Slightly ThickPavilionCulet: NoneDepth 61.9%

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 6
Current: HK$338,371 HKD|Low: HK$272,323 HKD|High: HK$351,049 HKD|Avg: HK$326,405 HKD|-3.4%
Aurelinne
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 5HK$272,323 HKD
Retailer 8HK$302,244 HKD
Retailer 10HK$311,462 HKD
Retailer 4HK$312,631 HKD
Retailer 2HK$313,306 HKD
Retailer 3HK$313,306 HKD
Retailer 6HK$325,843 HKD
Retailer 7HK$326,776 HKD
AurelinneHK$338,371 HKD
Retailer 9HK$339,344 HKD

19 data points across 10 retailers

15 retailersHK$272,323 HKD to HK$339,344 HKD

A
Cheapest Retailer
-
HK$272,323 HKD
Retailer 2
-
HK$281,886 HKD
View
Price last confirmed 14 days ago
B+
Retailer 3
-
HK$302,244 HKD
View
Retailer 4
-
HK$311,462 HKD
View
Price last confirmed 8 days ago
B+
Retailer 5
-
HK$312,631 HKD
View
B+
Retailer 6
-
HK$313,306 HKD
View
B+
Retailer 7
-
HK$313,306 HKD
View
Retailer 8
-
HK$324,446 HKD
View
Price last confirmed 15 days ago
B+
Retailer 9
-
HK$325,843 HKD
View
B+
Retailer 10
-
HK$326,776 HKD
View
Retailer 11
-
HK$337,422 HKD
View
Price last confirmed 15 days ago
Retailer 12
-
HK$338,042 HKD
View
Price last confirmed 11 days ago
B+
Retailer 13
-
HK$338,371 HKD
View
B+
Retailer 14
-
HK$339,344 HKD
View
Most Expensive
Aurelinne
ef843a20-8ae8-4ab8-b564-142ec00080e9 · Oct 23
HK$350,398 HKD
$44,664 USD
View
Price last confirmed 14 days ago
14 more retailers have this diamond
Prices start from HK$272,323 HKDSave up to HK$67,022 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.

A
4.25ct Round
HK$272,323 HKD