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Heart|Natural|GIA

1.51ct I SI1 Heart Natural Diamond

EX • I/SI1 • GIA 6555506948

Certificate GIA 6555506948

Diamond specifications and retailer prices

From $5,066 AUD
As of November 6, 2026
Save $6,789 AUD (57%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $11,856 AUD at NZ Jewellers · As of November 5, 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6555506948. Listed at 18 retailers as of November 5, 2026, with prices from $5,066 to $11,856, a $6,789 spread on the same certified stone. NZ Jewellers lists it at $11,856. 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
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6555506948
Dimensions7.00 × 7.88 × 4.58 mm
L/W Ratio1.13
Girdle conditionFaceted
Top View
7.00 mm7.88 mm1.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6555506948
Side View
Table 59.0%CrownGirdle: MED-THKPavilionCulet: NDepth 58.2%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $11,856 AUD|Low: $4,992 AUD|High: $12,102 AUD|Avg: $7,170 AUD|-2.0%
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
Retailer 15
Retailer 16
Retailer 17
November 6, 2026
Retailer 16$5,066 AUD
Retailer 4$5,088 AUD
Retailer 14$5,410 AUD
Retailer 6$5,682 AUD
Retailer 8$5,689 AUD
Retailer 3$5,691 AUD
Retailer 2$5,758 AUD
Retailer 9$5,858 AUD
Retailer 15$6,302 AUD
Retailer 11$6,324 AUD
Retailer 10$6,421 AUD
Retailer 5$6,525 AUD
Retailer 12$8,302 AUD
Retailer 17$8,631 AUD
Retailer 7$10,559 AUD
Retailer 13$10,808 AUD
NZ Jewellers$11,856 AUD

21 data points across 17 retailers

18 retailers$5,066 AUD to $11,856 AUD

A
Cheapest Retailer
-
$5,066 AUD
A
Retailer 2
-
$5,088 AUD
View
A
Retailer 3
-
$5,410 AUD
View
A
Retailer 4
-
$5,682 AUD
View
A
Retailer 5
-
$5,689 AUD
View
A
Retailer 6
-
$5,691 AUD
View
Final sale: no returns
A
Retailer 7
-
$5,758 AUD
View
A
Retailer 8
-
$5,858 AUD
View
A
Retailer 9
-
$6,302 AUD
View
A
Retailer 10
-
$6,324 AUD
View
A
Retailer 11
-
$6,421 AUD
View
A
Retailer 12
-
$6,525 AUD
View
Retailer 13
-
$7,334 AUD
View
Price last confirmed 29 days ago
B+
Retailer 14
-
$8,302 AUD
View
B
Retailer 15
-
$8,631 AUD
View
B
Retailer 16
-
$10,559 AUD
View
B
Retailer 17
-
$10,808 AUD
View
Most Expensive
B
NZ Jewellers
28ec3ddb-0863-4b50-998a-7b353d1e8e5b · Nov 5
$11,856 AUD
$8,146 USD
View
17 more retailers have this diamond
Prices start from $5,066 AUDSave up to $6,789 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
$5,066 AUD