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Round|Natural|GIA

0.51ct E SI2 Round Natural Diamond

EX • E/SI2 • GIA 1507447220

Certificate GIA 1507447220

Diamond specifications and retailer prices

From HK$3,726 HKD
As of October 31, 2026
Save HK$12,066 HKD (76%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: HK$16,075 HKD at NZ Jewellers · As of September 24, 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 E colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1507447220. Listed at 20 retailers as of October 31, 2026, with a 324% 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
E
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 1507447220
Dimensions5.15 × 5.11 × 3.17 mm
L/W Ratio1.01
Star length45%
Lower girdle80%
Key to symbols
Crystal
Top View
5.15 mm5.11 mm0.51 ctE / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1507447220
Side View
Table 57.0%Crown 34.5°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 61.7%

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: Oct 31
Current: HK$15,792 HKD|Low: HK$3,507 HKD|High: HK$16,075 HKD|Avg: HK$7,157 HKD|-1.8%
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
Retailer 14
Retailer 15
November 6, 2026
Retailer 4HK$3,507 HKD
Retailer 12HK$3,726 HKD
Retailer 3HK$4,762 HKD
Retailer 10HK$4,982 HKD
Retailer 7HK$5,037 HKD
Retailer 2HK$5,225 HKD
Retailer 14HK$5,421 HKD
Retailer 15HK$5,421 HKD
Retailer 6HK$6,064 HKD
Retailer 9HK$6,104 HKD
Retailer 5HK$6,315 HKD
Retailer 8HK$6,692 HKD
Retailer 11HK$11,603 HKD
Retailer 13HK$14,592 HKD
NZ JewellersHK$15,792 HKD

36 data points across 15 retailers

20 retailersHK$3,726 HKD to HK$15,792 HKD

A
Cheapest Retailer
-
HK$3,726 HKD
A
Retailer 2
-
HK$4,762 HKD
View
A
Retailer 3
-
HK$4,833 HKD
View
A
Retailer 4
-
HK$4,982 HKD
View
A
Retailer 5
-
HK$5,037 HKD
View
Retailer 6
-
HK$5,123 HKD
View
Price last confirmed 43 days ago
A
Retailer 7
-
HK$5,225 HKD
View
Retailer 8
-
HK$5,421 HKD
View
Price last confirmed 8 days ago
A
Retailer 9
-
HK$5,421 HKD
View
A
Retailer 10
-
HK$5,813 HKD
View
Retailer 11
-
HK$5,915 HKD
View
Price last confirmed 45 days ago
A
Retailer 12
-
HK$6,064 HKD
View
A
Retailer 13
-
HK$6,104 HKD
View
A
Retailer 14
-
HK$6,315 HKD
View
A
Retailer 15
-
HK$6,692 HKD
View
B
Retailer 16
-
HK$10,277 HKD
View
B
Retailer 17
-
HK$11,603 HKD
View
Retailer 18
-
HK$14,592 HKD
View
Price last confirmed 9 days ago
B
Retailer 19
-
HK$15,792 HKD
View
Most Expensive
NZ Jewellers
5b1bc26a-99ae-42e4-af9d-c455f182f092 · Sep 24
HK$16,075 HKD
$2,049 USD
View
Price last confirmed 42 days ago
19 more retailers have this diamond
Prices start from HK$3,726 HKDSave up to HK$12,066 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$3,726 HKD