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Heart|Natural|GIA

1.51ct I SI1 Heart Natural Diamond

ID • I/SI1 • GIA 1535629313

Certificate GIA 1535629313

Diamond specifications and retailer prices

From $5,066 AUD
As of November 6, 2026
Save $5,456 AUD (52%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $11,738 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 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 1535629313. Listed at 19 retailers as of November 4, 2026, with a 108% 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
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1535629313
Dimensions7.99 × 7.02 × 4.65 mm
L/W Ratio1.14
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Cloud, Feather, Needle
Top View
7.99 mm7.02 mm1.51 ctI / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1535629313
Side View
Table 58.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 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: $5,381 AUD|Low: $5,047 AUD|High: $10,860 AUD|Avg: $6,810 AUD|-3.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 10$5,066 AUD
Retailer 1$5,381 AUD
Retailer 7$6,038 AUD
Retailer 2$6,114 AUD
Retailer 4$6,440 AUD
Retailer 5$6,709 AUD
Retailer 9$6,797 AUD
Retailer 3$6,836 AUD
Retailer 11$6,842 AUD
Retailer 6$8,082 AUD
Retailer 8$10,523 AUD

33 data points across 11 retailers

19 retailers$5,066 AUD to $10,523 AUD

A
Cheapest Retailer
-
$5,066 AUD
A
Retailer 2
-
$5,381 AUD
View
A
Retailer 3
-
$6,038 AUD
View
A
Retailer 4
-
$6,114 AUD
View
Final sale: no returns
B+
Retailer 5
-
$6,245 AUD
View
B+
Retailer 6
-
$6,251 AUD
View
B+
Retailer 7
-
$6,440 AUD
View
B+
Retailer 8
-
$6,610 AUD
View
B+
Retailer 9
-
$6,709 AUD
View
Retailer 10
-
$6,737 AUD
View
Price last confirmed 22 days ago
Retailer 11
-
$6,737 AUD
View
Price last confirmed 22 days ago
Retailer 12
-
$6,737 AUD
View
Price last confirmed 20 days ago
B+
Retailer 13
-
$6,797 AUD
View
Retailer 14
-
$6,836 AUD
View
Price last confirmed 29 days ago
B+
Retailer 15
-
$6,842 AUD
View
Retailer 16
-
$7,775 AUD
View
Price last confirmed 19 days ago
B+
Retailer 17
-
$8,082 AUD
View
B
Retailer 18
-
$10,523 AUD
View
Most Expensive
NZ Jewellers
a8878e84-ef46-4992-b67a-8eceeb60932b · Oct 18
$11,738 AUD
$8,065 USD
View
Price last confirmed 19 days ago
18 more retailers have this diamond
Prices start from $5,066 AUDSave up to $5,456 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