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Round|Natural|GIA

1.59ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 6555735960

Certificate GIA 6555735960

Diamond specifications and retailer prices

From $5,886 AUD
HK$32,300 HKD
As of November 1, 2026
Save $7,513 AUD (56%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $14,165 AUD at NZ Jewellers · As of September 26, 2026
View at NZ Jewellers

About this 1.59ct natural round diamond

This 1.59ct natural round 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 and certified by GIA 6555735960. Listed at 12 retailers as of October 27, 2026, with a 128% 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

1.59
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 6555735960
Dimensions7.41 × 7.46 × 4.66 mm
L/W Ratio1.01
Key to symbols
Crystal, Feather
Top View
7.41 mm7.46 mm1.59 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6555735960
Side View
Table 57.0%CrownGirdle: MED-STKPavilion 41.2°Culet: NoneDepth 62.7%

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 1
Current: $13,399 AUD|Low: $5,831 AUD|High: $14,011 AUD|Avg: $8,587 AUD|-4.4%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 6$5,886 AUD
Retailer 3$6,678 AUD
Retailer 5$6,943 AUD
Retailer 8$7,482 AUD
Retailer 7$8,011 AUD
Retailer 9$8,011 AUD
Retailer 10$8,132 AUD
Retailer 4$9,020 AUD
Retailer 2$12,759 AUD
NZ Jewellers$13,399 AUD

43 data points across 10 retailers

12 retailers$5,886 AUD to $13,399 AUD

A
Cheapest Retailer
-
$5,886 AUD
HK$32,300 HKD
A
Retailer 2
-
$6,678 AUD
€4,468 EUR
View
A
Retailer 3
-
$6,943 AUD
$4,877 USD
View
A
Retailer 4
-
$7,482 AUD
SGD 7,102 SGD
View
A
Retailer 5
-
$8,011 AUD
$5,627 USD
View
A
Retailer 6
-
$8,011 AUD
$5,627 USD
View
B+
Retailer 7
-
$8,132 AUD
View
Retailer 8
-
$8,378 AUD
$5,885 USD
View
Price last confirmed 35 days ago
B+
Retailer 9
-
$9,020 AUD
€6,034 EUR
View
B
Retailer 10
-
$12,759 AUD
£7,057 GBP
View
B
Retailer 11
-
$13,399 AUD
$9,412 USD
View
Most Expensive
NZ Jewellers
0176224d-a7e5-4611-99f4-afb4be051338 · Sep 26
$14,165 AUD
$9,950 USD
View
Price last confirmed 36 days ago
11 more retailers have this diamond
Prices start from $5,886 AUDSave up to $7,513 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
1.59ct Round
$5,886 AUD