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Round|Natural|GIA

0.51ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 6431323124

Certificate GIA 6431323124

Diamond specifications and retailer prices

From HK$3,245 HKD
As of November 6, 2026
Save HK$8,198 HKD (72%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: HK$13,904 HKD at NZ Jewellers · As of September 15, 2026
View at NZ Jewellers

About this 0.51ct natural round diamond

This 0.51ct natural round sits in the half to three-quarter carat band, graded H colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6431323124. Listed at 20 retailers as of November 6, 2026, with a 253% 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

0.51
Carat
H
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 6431323124
Dimensions5.14 × 5.12 × 3.20 mm
L/W Ratio1.00
Top View
5.14 mm5.12 mm0.51 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6431323124
Side View
Table 58.0%Crown 36°Girdle: MED-MEDPavilion 41°Culet: NoneDepth 62.4%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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$3,245 HKD|Low: HK$3,245 HKD|High: HK$10,361 HKD|Avg: HK$5,463 HKD|-2.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 1HK$3,245 HKD
Retailer 2HK$4,091 HKD
Retailer 10HK$4,193 HKD
Retailer 7HK$4,428 HKD
Retailer 9HK$4,773 HKD
Retailer 5HK$5,353 HKD
Retailer 6HK$5,518 HKD
Retailer 3HK$5,698 HKD
Retailer 4HK$5,941 HKD
Retailer 8HK$10,220 HKD

32 data points across 10 retailers

20 retailersHK$3,245 HKD to HK$11,443 HKD

A
Cheapest Retailer
-
HK$3,245 HKD
A
Retailer 2
-
HK$4,091 HKD
View
Final sale: no returns
A
Retailer 3
-
HK$4,193 HKD
View
A
Retailer 4
-
HK$4,428 HKD
View
Retailer 5
-
HK$4,436 HKD
View
Price last confirmed 53 days ago
Retailer 6
-
HK$4,773 HKD
View
Price last confirmed 8 days ago
A
Retailer 7
-
HK$4,773 HKD
View
Retailer 8
-
HK$4,773 HKD
View
Price last confirmed 22 days ago
Retailer 9
-
HK$4,773 HKD
View
Price last confirmed 21 days ago
Retailer 10
-
HK$4,773 HKD
View
Price last confirmed 9 days ago
Retailer 11
-
HK$5,118 HKD
View
Price last confirmed 53 days ago
B+
Retailer 12
-
HK$5,345 HKD
View
B+
Retailer 13
-
HK$5,353 HKD
View
B+
Retailer 14
-
HK$5,463 HKD
View
B+
Retailer 15
-
HK$5,518 HKD
View
B+
Retailer 16
-
HK$5,698 HKD
View
B+
Retailer 17
-
HK$5,941 HKD
View
B
Retailer 18
-
HK$10,220 HKD
View
B
Retailer 19
-
HK$11,443 HKD
View
Most Expensive
NZ Jewellers
d344b10c-328b-4fa8-877e-b610de254c39 · Sep 15
HK$13,904 HKD
$1,774 USD
View
Price last confirmed 52 days ago
19 more retailers have this diamond
Prices start from HK$3,245 HKDSave up to HK$8,198 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
0.51ct Round
HK$3,245 HKD