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Heart|Natural|IGI

0.51ct I SI1 Heart Natural Diamond

VG • I/SI1 • IGI 810634844

Shape and cutting style on the report: Heart brilliant

Certificate IGI 810634844

Diamond specifications and retailer prices

From HK$2,963 HKD
As of November 5, 2026
Save HK$6,152 HKD (67%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: HK$12,728 HKD at NZ Jewellers · As of October 21, 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 810634844. Listed at 13 retailers as of November 2, 2026, with a 208% 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
I
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle38.5°
Pavilion angle37.1°
OriginNatural
Grading LabIGI
CertificateIGI 810634844
Dimensions4.84 × 5.55 × 3.12 mm
L/W Ratio1.15
Girdle conditionFaceted
Top View
4.84 mm5.55 mm0.51 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 810634844
Side View
Table 61.0%Crown 38.5°Girdle: MED-THKPavilion 37.1°Culet: NoneDepth 56.2%

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 5
Current: HK$12,728 HKD|Low: HK$2,963 HKD|High: HK$13,010 HKD|Avg: HK$5,381 HKD|-2.2%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 8HK$2,963 HKD
Retailer 4HK$3,315 HKD
Retailer 9HK$3,488 HKD
Retailer 3HK$3,574 HKD
Retailer 6HK$4,099 HKD
Retailer 7HK$4,898 HKD
Retailer 2HK$5,008 HKD
Retailer 10HK$5,055 HKD
Retailer 5HK$5,235 HKD
Retailer 12HK$7,547 HKD
Retailer 11HK$9,115 HKD
NZ JewellersHK$12,728 HKD

32 data points across 12 retailers

13 retailersHK$2,963 HKD to HK$9,115 HKD

A
Cheapest Retailer
-
HK$2,963 HKD
Retailer 2
-
HK$3,315 HKD
View
Price last confirmed 16 days ago
A
Retailer 3
-
HK$3,488 HKD
View
Retailer 4
-
HK$3,574 HKD
View
Price last confirmed 16 days ago
Retailer 5
-
HK$3,605 HKD
View
Price last confirmed 23 days ago
B+
Retailer 6
-
HK$4,099 HKD
View
B
Retailer 7
-
HK$4,898 HKD
View
B
Retailer 8
-
HK$5,008 HKD
View
B
Retailer 9
-
HK$5,055 HKD
View
B+
Retailer 10
-
HK$5,235 HKD
View
B
Retailer 11
-
HK$7,547 HKD
View
C
Retailer 12
-
HK$9,115 HKD
View
Most Expensive
NZ Jewellers
6c336c72-22d3-457d-9cf0-2f67feff8eff · Oct 21
HK$12,728 HKD
$1,624 USD
View
Price under review
12 more retailers have this diamond
Prices start from HK$2,963 HKDSave up to HK$6,152 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$2,963 HKD