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Heart|Natural|GIA

1.70ct J SI1 Heart Natural Diamond

EX • J/SI1 • GIA 1559659348

Certificate GIA 1559659348

Diamond specifications and retailer prices

From $6,427 AUD
As of November 6, 2026
Save $6,133 AUD (49%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $14,410 AUD at NZ Jewellers · As of October 18, 2026
View at NZ Jewellers

About this 1.7ct natural heart diamond

This 1.7ct natural heart sits in the one-and-a-half to two carat band, graded J 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 1559659348. Listed at 19 retailers as of November 6, 2026, with a 95% 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

1.70
Carat
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1559659348
Dimensions7.66 × 8.51 × 4.70 mm
L/W Ratio1.11
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Cloud, Feather, Crystal, Needle, Natural
Top View
7.66 mm8.51 mm1.70 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1559659348
Side View
Table 64.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 55.3%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $12,560 AUD|Low: $6,408 AUD|High: $12,845 AUD|Avg: $8,588 AUD|-2.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 7, 2026
Retailer 9$6,427 AUD
Retailer 5$6,768 AUD
Retailer 3$7,367 AUD
Retailer 8$7,641 AUD
Retailer 11$7,912 AUD
Retailer 4$8,280 AUD
Retailer 2$8,661 AUD
Retailer 10$8,798 AUD
Retailer 6$9,313 AUD
Retailer 7$10,459 AUD
Retailer 1$12,560 AUD

30 data points across 11 retailers

19 retailers$6,427 AUD to $12,560 AUD

B+
Cheapest Retailer
-
$6,427 AUD
B+
Retailer 2
-
$6,768 AUD
View
Retailer 3
-
$7,367 AUD
View
Price last confirmed 11 days ago
B
Retailer 4
-
$7,641 AUD
View
B+
Retailer 5
-
$7,901 AUD
View
B+
Retailer 6
-
$7,903 AUD
View
B+
Retailer 7
-
$7,912 AUD
View
Final sale: no returns
B
Retailer 8
-
$8,275 AUD
View
B+
Retailer 9
-
$8,280 AUD
View
Retailer 10
-
$8,616 AUD
View
Price last confirmed 22 days ago
Retailer 11
-
$8,616 AUD
View
Price last confirmed 20 days ago
Retailer 12
-
$8,616 AUD
View
Price last confirmed 22 days ago
Retailer 13
-
$8,661 AUD
View
Price last confirmed 19 days ago
B
Retailer 14
-
$8,798 AUD
View
B
Retailer 15
-
$9,313 AUD
View
Retailer 16
-
$9,942 AUD
View
Price last confirmed 19 days ago
B
Retailer 17
-
$10,459 AUD
View
B
Retailer 18
-
$12,560 AUD
View
Most Expensive
NZ Jewellers
a3545e9c-b1bf-415c-98b7-4ec2331e6c66 · Oct 18
$14,410 AUD
$9,901 USD
View
Price last confirmed 20 days ago
18 more retailers have this diamond
Prices start from $6,427 AUDSave up to $6,133 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.

B+
1.70ct Heart
$6,427 AUD