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Heart|Natural|GIA

1.51ct I SI1 Heart Natural Diamond

ID • I/SI1 • GIA 6552652410

Certificate GIA 6552652410

Diamond specifications and retailer prices

From $6,043 AUD
As of November 6, 2026
Save $6,657 AUD (52%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $13,243 AUD at NZ Jewellers · As of October 21, 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 6552652410. Listed at 16 retailers as of November 4, 2026, with a 110% 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
I
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishVery Good
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6552652410
Dimensions7.87 × 6.97 × 4.55 mm
L/W Ratio1.13
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Crystal, Needle
Top View
7.87 mm6.97 mm1.51 ctI / SI1
OriginNatural
CutIdeal
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 6552652410
Side View
Table 61.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 57.9%

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: $13,243 AUD|Low: $5,517 AUD|High: $13,243 AUD|Avg: $8,885 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
November 6, 2026
Retailer 4$6,043 AUD
Retailer 5$6,622 AUD
Retailer 3$7,174 AUD
Retailer 2$7,545 AUD
Retailer 6$7,763 AUD
Retailer 10$8,121 AUD
Retailer 11$8,121 AUD
Retailer 13$8,277 AUD
Retailer 12$8,383 AUD
Retailer 7$8,997 AUD
Retailer 8$9,754 AUD
Retailer 9$12,700 AUD
NZ Jewellers$13,243 AUD

38 data points across 13 retailers

16 retailers$6,043 AUD to $12,700 AUD

A
Cheapest Retailer
-
$6,043 AUD
A
Retailer 2
-
$6,070 AUD
View
B+
Retailer 3
-
$7,161 AUD
View
Retailer 4
-
$7,174 AUD
View
Price last confirmed 18 days ago
Retailer 5
-
$7,174 AUD
View
Price last confirmed 22 days ago
B+
Retailer 6
-
$7,545 AUD
View
B+
Retailer 7
-
$7,763 AUD
View
B+
Retailer 8
-
$8,121 AUD
View
B+
Retailer 9
-
$8,121 AUD
View
B+
Retailer 10
-
$8,207 AUD
View
Retailer 11
-
$8,277 AUD
View
Price last confirmed 17 days ago
B
Retailer 12
-
$8,383 AUD
View
B+
Retailer 13
-
$8,997 AUD
View
B
Retailer 14
-
$9,754 AUD
View
B
Retailer 15
-
$12,700 AUD
View
Most Expensive
NZ Jewellers
5f69c31b-1f01-42cc-8698-0ea82b4976e0 · Oct 21
$13,243 AUD
$9,099 USD
View
Price last confirmed 16 days ago
15 more retailers have this diamond
Prices start from $6,043 AUDSave up to $6,657 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
$6,043 AUD