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Heart|Natural|IGI

1.51ct K SI1 Heart Natural Diamond

VG • K/SI1 • IGI 803629052

Shape and cutting style on the report: Heart brilliant

Certificate IGI 803629052

Diamond specifications and retailer prices

From $3,122 AUD
As of November 6, 2026
Save $3,005 AUD (49%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $7,556 AUD at NZ Jewellers · As of September 30, 2026
View at NZ Jewellers

About this 1.51ct natural heart diamond

This 1.51ct natural heart sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 803629052. Listed at 14 retailers as of November 4, 2026, with a 96% 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

1.51
Carat
K
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.2°
Pavilion angle42.8°
OriginNatural
Grading LabIGI
CertificateIGI 803629052
Dimensions6.71 × 7.91 × 4.92 mm
L/W Ratio1.18
Girdle conditionFaceted
Top View
6.71 mm7.91 mm1.51 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 803629052
Side View
Table 60.0%Crown 37.2°Girdle: MED-THKPavilion 42.8°Culet: NoneDepth 62.2%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $3,122 AUD|Low: $3,122 AUD|High: $6,410 AUD|Avg: $3,992 AUD|-4.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 1$3,122 AUD
Retailer 6$3,173 AUD
Retailer 7$3,439 AUD
Retailer 9$3,615 AUD
Retailer 2$3,657 AUD
Retailer 8$3,689 AUD
Retailer 3$3,720 AUD
Retailer 4$4,280 AUD
Retailer 5$6,127 AUD

43 data points across 9 retailers

14 retailers$3,122 AUD to $6,127 AUD

A
Cheapest Retailer
-
$3,122 AUD
A
Retailer 2
-
$3,173 AUD
View
B+
Retailer 3
-
$3,439 AUD
View
Retailer 4
-
$3,615 AUD
View
Price last confirmed 36 days ago
Retailer 5
-
$3,615 AUD
View
Price last confirmed 21 days ago
B+
Retailer 6
-
$3,657 AUD
View
B+
Retailer 7
-
$3,689 AUD
View
A
Retailer 8
-
$3,720 AUD
View
Retailer 9
-
$3,781 AUD
View
Price last confirmed 36 days ago
Retailer 10
-
$4,171 AUD
View
Price last confirmed 61 days ago
Retailer 11
-
$4,171 AUD
View
Price last confirmed 38 days ago
B+
Retailer 12
-
$4,280 AUD
View
B
Retailer 13
-
$6,127 AUD
View
Most Expensive
NZ Jewellers
bebea34d-aa10-4dfc-9a6a-812814e66304 · Sep 30
$7,556 AUD
$5,192 USD
View
Price last confirmed 37 days ago
13 more retailers have this diamond
Prices start from $3,122 AUDSave up to $3,005 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
1.51ct Heart
$3,122 AUD