Heart|Natural|GIA

1.55ct K SI1 Heart Natural Diamond

VG • K/SI1 • GIA 2507568166

Certificate GIA 2507568166

Diamond specifications and retailer prices

From $9,619 AUD
As of November 6, 2026
14 retailers carry this diamond
Most expensive: $10,266 AUD at NZ Jewellers · As of September 29, 2026
View at NZ Jewellers

About this 1.55ct natural heart diamond

This 1.55ct 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 stated by the retailer rather than the lab and certified by GIA 2507568166. Listed at 14 retailers as of November 6, 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

1.55
Carat
K
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishVery Good
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2507568166
Dimensions7.88 × 7.21 × 4.17 mm
L/W Ratio1.09
Top View
7.88 mm7.21 mm1.55 ctK / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2507568166
Side View
Table 57.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 57.9%

Caratlytics Score

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C
Average
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Price History

Last verified: Nov 6
Current: $9,619 AUD|Low: $4,739 AUD|High: $10,197 AUD|Avg: $6,309 AUD|+41.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 9$4,739 AUD
Retailer 2$4,846 AUD
Retailer 13$5,014 AUD
Retailer 11$5,340 AUD
Retailer 10$5,645 AUD
Retailer 5$5,676 AUD
Retailer 6$6,001 AUD
Retailer 3$6,025 AUD
Retailer 12$6,669 AUD
Retailer 4$6,952 AUD
Retailer 7$7,155 AUD
Retailer 1$9,619 AUD
Retailer 8$9,972 AUD

31 data points across 13 retailers

14 retailers

Retailer 1
-
$4,739 AUD
Price last confirmed 25 days ago
Retailer 2
-
$5,014 AUD
View
Price last confirmed 26 days ago
Retailer 3
-
$5,338 AUD
View
Price last confirmed 29 days ago
Retailer 4
-
$5,338 AUD
View
Price last confirmed 25 days ago
Retailer 5
-
$5,340 AUD
View
Price last confirmed 26 days ago
Retailer 6
-
$5,544 AUD
View
Price last confirmed 36 days ago
Retailer 7
-
$5,645 AUD
View
Price last confirmed 27 days ago
Retailer 8
-
$6,001 AUD
View
Price last confirmed 24 days ago
Retailer 9
-
$6,159 AUD
View
Price last confirmed 28 days ago
Retailer 10
-
$6,669 AUD
View
Price last confirmed 25 days ago
Retailer 11
-
$7,155 AUD
View
Price last confirmed 25 days ago
C
Retailer 12
-
$9,619 AUD
View
Retailer 13
-
$9,972 AUD
View
Price last confirmed 26 days ago
Most Expensive
NZ Jewellers
7fb79610-9bae-4e2e-870b-ea2ab4484357 · Sep 29
$10,266 AUD
$7,054 USD
View
Price last confirmed 38 days ago
13 more retailers have this diamond
Prices start from $9,619 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.

C
1.55ct Heart
$9,619 AUD