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Round|Natural|GIA

0.51ct I SI2 Round Natural Diamond

EX • I/SI2 • GIA 7558959697

Certificate GIA 7558959697

Diamond specifications and retailer prices

From HK$2,997 HKD
As of November 6, 2026
Save HK$6,127 HKD (67%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: HK$12,709 HKD at NZ Jewellers · As of October 23, 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 7558959697. Listed at 14 retailers as of November 2, 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
FluorescenceFaint
Crown angle34.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 7558959697
Dimensions5.15 × 5.17 × 3.15 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizeNone
Top View
5.15 mm5.17 mm0.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 7558959697
Side View
Table 57.0%Crown 34.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.1%

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$12,709 HKD|Low: HK$2,997 HKD|High: HK$13,133 HKD|Avg: HK$5,436 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$2,997 HKD
Retailer 13HK$3,413 HKD
Retailer 3HK$3,452 HKD
Retailer 10HK$3,640 HKD
Retailer 12HK$4,260 HKD
Retailer 4HK$4,362 HKD
Retailer 5HK$4,362 HKD
Retailer 6HK$4,872 HKD
Retailer 11HK$4,935 HKD
Retailer 9HK$5,178 HKD
Retailer 7HK$5,499 HKD
Retailer 8HK$9,124 HKD
NZ JewellersHK$12,709 HKD

36 data points across 13 retailers

14 retailersHK$2,997 HKD to HK$9,124 HKD

A
Cheapest Retailer
-
HK$2,997 HKD
A
Retailer 2
-
HK$3,413 HKD
View
A
Retailer 3
-
HK$3,452 HKD
View
A
Retailer 4
-
HK$3,640 HKD
View
Final sale: no returns
Retailer 5
-
HK$4,260 HKD
View
Price last confirmed 8 days ago
Retailer 6
-
HK$4,362 HKD
View
Price last confirmed 15 days ago
Retailer 7
-
HK$4,362 HKD
View
Price last confirmed 10 days ago
Retailer 8
-
HK$4,872 HKD
View
Price last confirmed 45 days ago
A
Retailer 9
-
HK$4,872 HKD
View
A
Retailer 10
-
HK$4,935 HKD
View
B+
Retailer 11
-
HK$5,178 HKD
View
B+
Retailer 12
-
HK$5,499 HKD
View
B
Retailer 13
-
HK$9,124 HKD
View
Most Expensive
NZ Jewellers
093759c2-dd4f-48fd-9709-e17d9a3668cf · Oct 23
HK$12,709 HKD
$1,620 USD
View
Price last confirmed 14 days ago
13 more retailers have this diamond
Prices start from HK$2,997 HKDSave up to HK$6,127 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$2,997 HKD