CaratHunter
Plans
Heart|Natural|GIA

0.51ct G SI1 Heart Natural Diamond

VG • G/SI1 • GIA 6515727921

Certificate GIA 6515727921

Diamond specifications and retailer prices

From HK$3,966 HKD
As of November 6, 2026
Save HK$6,952 HKD (64%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: HK$14,821 HKD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 0.51ct natural heart diamond

This 0.51ct natural heart sits in the half to three-quarter carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 6515727921. Listed at 18 retailers as of November 2, 2026, with a 175% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.51
Carat
G
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.4°
Pavilion angle37.8°
OriginNatural
Grading LabGIA
CertificateGIA 6515727921
Dimensions5.69 × 5.07 × 2.76 mm
L/W Ratio1.12
Top View
5.69 mm5.07 mm0.51 ctG / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6515727921
Side View
Table 56.0%Crown 36.4°Girdle: STK-THKPavilion 37.8°Culet: NoneDepth 54.5%

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$14,821 HKD|Low: HK$3,966 HKD|High: HK$18,849 HKD|Avg: HK$6,474 HKD|-21.4%
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
Retailer 16
Retailer 17
Retailer 18
Retailer 19
November 6, 2026
Retailer 18HK$3,966 HKD
Retailer 4HK$4,232 HKD
Retailer 7HK$4,358 HKD
Retailer 12HK$4,569 HKD
Retailer 5HK$4,726 HKD
Retailer 9HK$5,086 HKD
Retailer 17HK$5,086 HKD
Retailer 19HK$5,455 HKD
Retailer 13HK$5,745 HKD
Retailer 6HK$5,753 HKD
Retailer 2HK$5,768 HKD
Retailer 8HK$5,800 HKD
Retailer 16HK$5,917 HKD
Retailer 3HK$6,231 HKD
Retailer 10HK$6,544 HKD
Retailer 14HK$7,289 HKD
Retailer 11HK$8,323 HKD
Retailer 15HK$10,917 HKD
NZ JewellersHK$14,821 HKD

22 data points across 19 retailers

18 retailersHK$3,966 HKD to HK$10,917 HKD

A
Cheapest Retailer
-
HK$3,966 HKD
B+
Retailer 2
-
HK$4,232 HKD
View
B+
Retailer 3
-
HK$4,358 HKD
View
Final sale: no returns
B+
Retailer 4
-
HK$4,569 HKD
View
B+
Retailer 5
-
HK$4,726 HKD
View
Retailer 6
-
HK$5,086 HKD
View
Price last confirmed 9 days ago
B
Retailer 7
-
HK$5,086 HKD
View
B+
Retailer 8
-
HK$5,455 HKD
View
B
Retailer 9
-
HK$5,745 HKD
View
B
Retailer 10
-
HK$5,753 HKD
View
B+
Retailer 11
-
HK$5,768 HKD
View
B
Retailer 12
-
HK$5,800 HKD
View
B
Retailer 13
-
HK$5,917 HKD
View
B
Retailer 14
-
HK$6,231 HKD
View
B
Retailer 15
-
HK$6,544 HKD
View
B
Retailer 16
-
HK$7,289 HKD
View
B
Retailer 17
-
HK$10,917 HKD
View
Most Expensive
NZ Jewellers
94ee7a14-1ad9-4429-8ee3-e09098f90f44 · Nov 5
HK$14,821 HKD
$1,891 USD
View
Price under review
17 more retailers have this diamond
Prices start from HK$3,966 HKDSave up to HK$6,952 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 Heart
HK$3,966 HKD