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Round|Natural|GIA

0.51ct I SI2 Round Natural Diamond

EX • I/SI2 • GIA 1559634200

Certificate GIA 1559634200

Diamond specifications and retailer prices

From HK$2,895 HKD
As of November 6, 2026
Save HK$5,907 HKD (67%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: HK$12,607 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1559634200. Listed at 14 retailers as of November 4, 2026, with a 204% 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
I
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 1559634200
Dimensions5.10 × 5.07 × 3.17 mm
L/W Ratio1.01
Girdle conditionFaceted
Top View
5.10 mm5.07 mm0.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1559634200
Side View
Table 58.0%Crown 35.5°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.3%

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$12,607 HKD|Low: HK$2,895 HKD|High: HK$13,023 HKD|Avg: HK$5,251 HKD|-3.2%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 2HK$2,895 HKD
Retailer 12HK$3,311 HKD
Retailer 13HK$3,334 HKD
Retailer 10HK$3,522 HKD
Retailer 3HK$4,260 HKD
Retailer 4HK$4,331 HKD
Retailer 5HK$4,331 HKD
Retailer 6HK$4,668 HKD
Retailer 11HK$4,809 HKD
Retailer 9HK$5,005 HKD
Retailer 8HK$5,327 HKD
Retailer 7HK$8,802 HKD
NZ JewellersHK$12,607 HKD

33 data points across 13 retailers

14 retailersHK$2,895 HKD to HK$8,802 HKD

A
Cheapest Retailer
-
HK$2,895 HKD
A
Retailer 2
-
HK$3,311 HKD
View
A
Retailer 3
-
HK$3,334 HKD
View
A
Retailer 4
-
HK$3,522 HKD
View
Final sale: no returns
Retailer 5
-
HK$4,260 HKD
View
Price last confirmed 10 days ago
Retailer 6
-
HK$4,331 HKD
View
Price last confirmed 22 days ago
Retailer 7
-
HK$4,331 HKD
View
Price last confirmed 22 days ago
A
Retailer 8
-
HK$4,668 HKD
View
A
Retailer 9
-
HK$4,809 HKD
View
Retailer 10
-
HK$4,982 HKD
View
Price last confirmed 45 days ago
A
Retailer 11
-
HK$5,005 HKD
View
B+
Retailer 12
-
HK$5,327 HKD
View
B
Retailer 13
-
HK$8,802 HKD
View
Most Expensive
NZ Jewellers
1a645d7a-b52f-4944-866d-8aa16a9d2074 · Oct 17
HK$12,607 HKD
$1,607 USD
View
Price last confirmed 20 days ago
13 more retailers have this diamond
Prices start from HK$2,895 HKDSave up to HK$5,907 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$2,895 HKD