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Round|Natural|GIA

1.55ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 2557621269

Certificate GIA 2557621269

Diamond specifications and retailer prices

From $6,575 AUD
As of November 4, 2026
Save $8,379 AUD (56%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $14,954 AUD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.55ct natural round diamond

This 1.55ct natural round sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2557621269. Listed at 9 retailers as of November 4, 2026, with prices from $6,575 to $14,954, a $8,379 spread on the same certified stone. NZ Jewellers lists it at $14,954. 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

1.55
Carat
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 2557621269
Dimensions7.30 × 7.36 × 4.59 mm
L/W Ratio1.01
Key to symbols
Crystal, Cloud, Needle
Top View
7.30 mm7.36 mm1.55 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557621269
Side View
Table 59.0%CrownGirdle: Slightly ThickPavilion 41.2°Culet: NoneDepth 62.6%

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 4
Current: $14,954 AUD|Low: $6,575 AUD|High: $15,861 AUD|Avg: $9,731 AUD|-5.7%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 7$6,575 AUD
Retailer 5$7,468 AUD
Retailer 9$7,671 AUD
Retailer 8$7,836 AUD
Retailer 3$8,941 AUD
Retailer 6$8,941 AUD
Retailer 2$9,708 AUD
Retailer 4$13,135 AUD
NZ Jewellers$14,954 AUD

39 data points across 9 retailers

9 retailers$6,575 AUD to $14,954 AUD

A
Cheapest Retailer
-
$6,575 AUD
A
Retailer 2
-
$7,468 AUD
View
Retailer 3
-
$7,671 AUD
View
Price last confirmed 10 days ago
A
Retailer 4
-
$7,836 AUD
View
B+
Retailer 5
-
$8,941 AUD
View
B+
Retailer 6
-
$8,941 AUD
View
B+
Retailer 7
-
$9,708 AUD
View
B
Retailer 8
-
$13,135 AUD
View
Most Expensive
B
NZ Jewellers
706c909f-4d06-495a-abc7-7b084a6df80a · Nov 5
$14,954 AUD
$10,275 USD
View
8 more retailers have this diamond
Prices start from $6,575 AUDSave up to $8,379 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
1.55ct Round
$6,575 AUD