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Heart|Natural|GIA

1.51ct K SI2 Heart Natural Diamond

EX • K/SI2 • GIA 7518024011

Certificate GIA 7518024011

Diamond specifications and retailer prices

From $3,371 AUD
As of November 6, 2026
Save $3,951 AUD (54%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $7,699 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 top-tier cut grade stated by the retailer rather than the lab and certified by GIA 7518024011. Listed at 14 retailers as of November 4, 2026, with a 117% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.51
Carat
K
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 7518024011
Dimensions7.00 × 7.97 × 4.64 mm
L/W Ratio1.14
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Twinning Wisp
Top View
7.00 mm7.97 mm1.51 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7518024011
Side View
Table 62.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 58.2%

Caratlytics Score

How it works →
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: $3,582 AUD|Low: $3,371 AUD|High: $7,778 AUD|Avg: $4,669 AUD|-6.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 7$3,371 AUD
Retailer 1$3,582 AUD
Retailer 4$4,120 AUD
Retailer 9$4,339 AUD
Retailer 8$4,598 AUD
Retailer 3$4,649 AUD
Retailer 2$4,694 AUD
Retailer 6$4,759 AUD
Retailer 5$7,322 AUD

44 data points across 9 retailers

14 retailers$3,371 AUD to $7,322 AUD

A
Cheapest Retailer
-
$3,371 AUD
A
Retailer 2
-
$3,582 AUD
View
A
Retailer 3
-
$4,120 AUD
View
A
Retailer 4
-
$4,339 AUD
View
Retailer 5
-
$4,420 AUD
View
Price last confirmed 19 days ago
Retailer 6
-
$4,420 AUD
View
Price last confirmed 21 days ago
Retailer 7
-
$4,589 AUD
View
Price last confirmed 21 days ago
A
Retailer 8
-
$4,598 AUD
View
A
Retailer 9
-
$4,649 AUD
View
B+
Retailer 10
-
$4,694 AUD
View
B+
Retailer 11
-
$4,759 AUD
View
Retailer 12
-
$5,100 AUD
View
Price last confirmed 18 days ago
B
Retailer 13
-
$7,322 AUD
View
Most Expensive
NZ Jewellers
bfe540df-00e2-4027-9cf9-2241629007fc · Oct 18
$7,699 AUD
$5,290 USD
View
Price last confirmed 19 days ago
13 more retailers have this diamond
Prices start from $3,371 AUDSave up to $3,951 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
$3,371 AUD