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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 $550 AUD
As of November 5, 2026
Save $1,142 AUD (67%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $2,364 AUD 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: $2,364 AUD|Low: $550 AUD|High: $2,416 AUD|Avg: $999 AUD|-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$550 AUD
Retailer 4$616 AUD
Retailer 9$648 AUD
Retailer 3$664 AUD
Retailer 6$761 AUD
Retailer 7$910 AUD
Retailer 2$930 AUD
Retailer 10$939 AUD
Retailer 5$972 AUD
Retailer 12$1,402 AUD
Retailer 11$1,693 AUD
NZ Jewellers$2,364 AUD

32 data points across 12 retailers

13 retailers$550 AUD to $1,693 AUD

A
Cheapest Retailer
-
$550 AUD
Retailer 2
-
$616 AUD
View
Price last confirmed 16 days ago
A
Retailer 3
-
$648 AUD
View
Retailer 4
-
$664 AUD
View
Price last confirmed 16 days ago
Retailer 5
-
$669 AUD
View
Price last confirmed 23 days ago
B+
Retailer 6
-
$761 AUD
View
B
Retailer 7
-
$910 AUD
View
B
Retailer 8
-
$930 AUD
View
B
Retailer 9
-
$939 AUD
View
B+
Retailer 10
-
$972 AUD
View
B
Retailer 11
-
$1,402 AUD
View
C
Retailer 12
-
$1,693 AUD
View
Most Expensive
NZ Jewellers
6c336c72-22d3-457d-9cf0-2f67feff8eff · Oct 21
$2,364 AUD
$1,624 USD
View
Price under review
12 more retailers have this diamond
Prices start from $550 AUDSave up to $1,142 AUD

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
$550 AUD