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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 $682 NZD
As of November 5, 2026
Save $1,416 NZD (67%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $2,930 NZD 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: $2,930 NZD|Low: $682 NZD|High: $2,994 NZD|Avg: $1,238 NZD|-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 8$682 NZD
Retailer 4$763 NZD
Retailer 9$803 NZD
Retailer 3$823 NZD
Retailer 6$943 NZD
Retailer 7$1,127 NZD
Retailer 2$1,153 NZD
Retailer 10$1,164 NZD
Retailer 5$1,205 NZD
Retailer 12$1,737 NZD
Retailer 11$2,098 NZD
NZ Jewellers$2,930 NZD

32 data points across 12 retailers

13 retailers$682 NZD to $2,098 NZD

A
Cheapest Retailer
-
$682 NZD
Retailer 2
-
$763 NZD
View
Price last confirmed 16 days ago
A
Retailer 3
-
$803 NZD
View
Retailer 4
-
$823 NZD
View
Price last confirmed 16 days ago
Retailer 5
-
$830 NZD
View
Price last confirmed 23 days ago
B+
Retailer 6
-
$943 NZD
View
B
Retailer 7
-
$1,127 NZD
View
B
Retailer 8
-
$1,153 NZD
View
B
Retailer 9
-
$1,164 NZD
View
B+
Retailer 10
-
$1,205 NZD
View
B
Retailer 11
-
$1,737 NZD
View
C
Retailer 12
-
$2,098 NZD
View
Most Expensive
NZ Jewellers
6c336c72-22d3-457d-9cf0-2f67feff8eff · Oct 21
$2,930 NZD
$1,624 USD
View
Price under review
12 more retailers have this diamond
Prices start from $682 NZDSave up to $1,416 NZD

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
$682 NZD