Heart|Natural|GIA

1.51ct K SI2 Heart Natural Diamond

FR • K/SI2 • GIA 2457516258

Certificate GIA 2457516258

Diamond specifications and retailer prices

From $3,804 AUD
As of November 4, 2026
13 retailers carry this diamond
Most expensive: $8,424 AUD at NZ Jewellers · As of October 18, 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 SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 2457516258. Listed at 13 retailers as of November 4, 2026. 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
SI2
Clarity
Fair
Cut (retailer stated)

Specifications

Cut (retailer stated)Fair
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2457516258
Dimensions6.65 × 7.96 × 4.74 mm
L/W Ratio1.20
Top View
6.65 mm7.96 mm1.51 ctK / SI2
OriginNatural
CutFair
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2457516258
Side View
Table 52.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 59.6%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 4
Current: $3,804 AUD|Low: $3,170 AUD|High: $8,182 AUD|Avg: $5,136 AUD|+20.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 4, 2026
Retailer 1$3,804 AUD
Retailer 9$3,924 AUD
Retailer 2$4,381 AUD
Retailer 7$4,381 AUD
Retailer 11$4,416 AUD
Retailer 5$4,871 AUD
Retailer 4$4,998 AUD
Retailer 3$5,206 AUD
Retailer 10$5,753 AUD
Retailer 8$6,976 AUD
Retailer 6$8,128 AUD

40 data points across 11 retailers

13 retailers

Retailer 1
-
$3,710 AUD
Price last confirmed 20 days ago
B+
Retailer 2
-
$3,804 AUD
View
Retailer 3
-
$3,924 AUD
View
Price last confirmed 17 days ago
Retailer 4
-
$4,381 AUD
View
Price last confirmed 17 days ago
Retailer 5
-
$4,381 AUD
View
Price last confirmed 21 days ago
Retailer 6
-
$4,416 AUD
View
Price last confirmed 19 days ago
Retailer 7
-
$4,464 AUD
View
Price last confirmed 22 days ago
Retailer 8
-
$4,548 AUD
View
Price last confirmed 21 days ago
Retailer 9
-
$4,998 AUD
View
Price last confirmed 16 days ago
Retailer 10
-
$5,055 AUD
View
Price last confirmed 18 days ago
Retailer 11
-
$6,976 AUD
View
Price last confirmed 18 days ago
Retailer 12
-
$8,128 AUD
View
Price last confirmed 20 days ago
Most Expensive
NZ Jewellers
ef507fc5-24aa-482a-a62b-d7e834340f75 · Oct 18
$8,424 AUD
$5,788 USD
View
Price last confirmed 19 days ago
12 more retailers have this diamond
Prices start from $3,804 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.

B+
1.51ct Heart
$3,804 AUD