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Round|Natural|GIA

1.50ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 2557356180

Certificate GIA 2557356180

Diamond specifications and retailer prices

From $4,497 AUD
As of November 6, 2026
Save $6,248 AUD (58%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $10,745 AUD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.5ct natural round diamond

This 1.5ct natural round sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2557356180. Listed at 7 retailers as of November 5, 2026, with prices from $4,497 to $10,745, a $6,248 spread on the same certified stone. NZ Jewellers lists it at $10,745. 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

1.50
Carat
H
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 2557356180
Dimensions7.24 × 7.28 × 4.50 mm
L/W Ratio1.01
Key to symbols
Feather, Crystal, Needle, Pinpoint
Top View
7.24 mm7.28 mm1.50 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557356180
Side View
Table 58.0%CrownGirdle: Slightly ThickPavilion 40.6°Culet: NoneDepth 62.0%

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: $10,745 AUD|Low: $4,497 AUD|High: $11,487 AUD|Avg: $7,445 AUD|-6.5%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 2$4,497 AUD
Retailer 3$5,670 AUD
Retailer 6$6,167 AUD
Retailer 7$6,167 AUD
Retailer 4$6,987 AUD
Retailer 5$9,797 AUD
NZ Jewellers$10,745 AUD

33 data points across 7 retailers

7 retailers$4,497 AUD to $10,745 AUD

A
Cheapest Retailer
-
$4,497 AUD
A
Retailer 2
-
$5,670 AUD
View
A
Retailer 3
-
$6,167 AUD
View
A
Retailer 4
-
$6,167 AUD
View
A
Retailer 5
-
$6,987 AUD
View
B+
Retailer 6
-
$9,797 AUD
View
Most Expensive
B
NZ Jewellers
790f15a6-c248-4e9e-9255-f1ed77dfcb14 · Nov 5
$10,745 AUD
$7,522 USD
View
6 more retailers have this diamond
Prices start from $4,497 AUDSave up to $6,248 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
1.50ct Round
$4,497 AUD