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Heart|Natural|GIA

1.50ct K SI1 Heart Natural Diamond

EX • K/SI1 • GIA 6542475806

Certificate GIA 6542475806

Diamond specifications and retailer prices

From $3,110 AUD
As of November 6, 2026
Save $4,052 AUD (57%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $8,546 AUD at NZ Jewellers · As of October 18, 2026
View at NZ Jewellers

About this 1.5ct natural heart diamond

This 1.5ct 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 top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6542475806. Listed at 16 retailers as of November 2, 2026, with a 130% 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

1.50
Carat
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6542475806
Dimensions7.17 × 8.28 × 4.54 mm
L/W Ratio1.15
Top View
7.17 mm8.28 mm1.50 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 6542475806
Side View
Table 64.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 54.8%

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: $8,546 AUD|Low: $3,074 AUD|High: $8,546 AUD|Avg: $4,586 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 6, 2026
Retailer 12$3,110 AUD
Retailer 10$3,157 AUD
Retailer 2$3,314 AUD
Retailer 13$4,010 AUD
Retailer 4$4,088 AUD
Retailer 6$4,088 AUD
Retailer 14$4,245 AUD
Retailer 7$4,321 AUD
Retailer 8$4,327 AUD
Retailer 5$4,439 AUD
Retailer 3$4,717 AUD
Retailer 9$4,989 AUD
Retailer 11$7,162 AUD
NZ Jewellers$8,546 AUD

35 data points across 14 retailers

16 retailers$3,110 AUD to $7,162 AUD

A
Cheapest Retailer
-
$3,110 AUD
A
Retailer 2
-
$3,157 AUD
View
A
Retailer 3
-
$3,314 AUD
View
A
Retailer 4
-
$3,879 AUD
View
A
Retailer 5
-
$4,010 AUD
View
Retailer 6
-
$4,088 AUD
View
Price last confirmed 21 days ago
Retailer 7
-
$4,088 AUD
View
Price last confirmed 19 days ago
Retailer 8
-
$4,245 AUD
View
Price last confirmed 21 days ago
A
Retailer 9
-
$4,321 AUD
View
A
Retailer 10
-
$4,327 AUD
View
B+
Retailer 11
-
$4,330 AUD
View
B+
Retailer 12
-
$4,439 AUD
View
Retailer 13
-
$4,717 AUD
View
Price last confirmed 18 days ago
B+
Retailer 14
-
$4,989 AUD
View
B
Retailer 15
-
$7,162 AUD
View
Most Expensive
NZ Jewellers
06b791bb-6a5c-4c82-83ca-7c84a71cfb71 · Oct 18
$8,546 AUD
$5,872 USD
View
Price last confirmed 19 days ago
15 more retailers have this diamond
Prices start from $3,110 AUDSave up to $4,052 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
1.50ct Heart
$3,110 AUD