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Round|Natural|GIA

0.51ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 7551171595

Certificate GIA 7551171595

Diamond specifications and retailer prices

From HK$4,851 HKD
As of November 4, 2026
Save HK$5,776 HKD (54%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: HK$18,222 HKD at NZ Jewellers · As of October 17, 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 7551171595. Listed at 14 retailers as of November 4, 2026, with a 119% 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
FluorescenceNone
Crown angle33.5°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 7551171595
Dimensions5.12 × 5.14 × 3.17 mm
L/W Ratio1.00
Girdle conditionSlightly Thick
Culet sizeNone
Key to symbols
Cloud, Crystal, Feather
Top View
5.12 mm5.14 mm0.51 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7551171595
Side View
Table 59.0%Crown 33.5°Girdle: MED-STKPavilion 41.8°Culet: NoneDepth 61.8%

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 4
Current: HK$7,477 HKD|Low: HK$4,452 HKD|High: HK$15,275 HKD|Avg: HK$8,218 HKD|-1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 8HK$4,851 HKD
Retailer 9HK$5,165 HKD
Retailer 6HK$5,267 HKD
Retailer 2HK$6,866 HKD
Retailer 7HK$7,312 HKD
Retailer 1HK$7,477 HKD
Retailer 4HK$8,206 HKD
Retailer 3HK$10,628 HKD
Retailer 5HK$15,228 HKD

39 data points across 9 retailers

14 retailersHK$4,851 HKD to HK$10,628 HKD

Retailer 1
-
HK$4,695 HKD
Price last confirmed 26 days ago
A
Retailer 2
-
HK$4,851 HKD
View
Final sale: no returns
A
Retailer 3
-
HK$5,165 HKD
View
Retailer 4
-
HK$5,267 HKD
View
Price last confirmed 8 days ago
Retailer 5
-
HK$5,463 HKD
View
Price last confirmed 15 days ago
B+
Retailer 6
-
HK$6,113 HKD
View
B+
Retailer 7
-
HK$6,866 HKD
View
Retailer 8
-
HK$7,312 HKD
View
Price last confirmed 9 days ago
B+
Retailer 9
-
HK$7,477 HKD
View
B
Retailer 10
-
HK$8,206 HKD
View
B
Retailer 11
-
HK$10,628 HKD
View
Retailer 12
-
HK$15,228 HKD
View
Price last confirmed 9 days ago
Retailer 13
-
HK$18,222 HKD
View
Price under review
Most Expensive
NZ Jewellers
749d0a12-d6c4-428d-8d95-e05061ffa3c9 · Oct 17
HK$18,222 HKD
$2,325 USD
View
Price under review
13 more retailers have this diamond
Prices start from HK$4,851 HKDSave up to HK$5,776 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$4,851 HKD