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Round|Natural|GIA

0.55ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 2557450247

Certificate GIA 2557450247

Diamond specifications and retailer prices

From $749 AUD
$526 USD
As of October 31, 2026
Save $2,602 AUD (78%) vs most expensive(unlock to see where)
27 retailers carry this diamond
Most expensive: $3,351 AUD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 0.55ct natural round diamond

This 0.55ct natural round sits in the half to three-quarter carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2557450247. Listed at 27 retailers as of October 30, 2026, with prices from $749 to $3,351, a $2,602 spread on the same certified stone. NZ Jewellers lists it at $3,351. 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

0.55
Carat
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2557450247
Dimensions5.19 × 5.23 × 3.29 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Cloud
Top View
5.19 mm5.23 mm0.55 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2557450247
Side View
Table 56.0%Crown 36.5°Girdle: THN-MEDPavilion 41°Culet: NoneDepth 63.1%

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: Oct 31
Current: $3,351 AUD|Low: $680 AUD|High: $3,351 AUD|Avg: $1,414 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 2, 2026
Retailer 11$749 AUD
Retailer 5$950 AUD
Retailer 9$975 AUD
Retailer 13$1,005 AUD
Retailer 4$1,039 AUD
Retailer 3$1,130 AUD
Retailer 10$1,224 AUD
Retailer 2$1,276 AUD
Retailer 6$1,380 AUD
Retailer 12$1,607 AUD
Retailer 8$1,650 AUD
Retailer 7$1,958 AUD
NZ Jewellers$3,351 AUD

44 data points across 13 retailers

27 retailers$749 AUD to $3,351 AUD

A
Cheapest Retailer
-
$749 AUD
$526 USD
Final sale: no returns
Retailer 2
-
$950 AUD
$667 USD
View
Price last confirmed 21 days ago
A
Retailer 3
-
$968 AUD
$680 USD
View
Retailer 4
-
$968 AUD
$680 USD
View
Price last confirmed 48 days ago
A
Retailer 5
-
$975 AUD
$685 USD
View
A
Retailer 6
-
$991 AUD
$696 USD
View
A
Retailer 7
-
$1,002 AUD
View
A
Retailer 8
-
$1,005 AUD
$706 USD
View
B+
Retailer 9
-
$1,039 AUD
$730 USD
View
B+
Retailer 10
-
$1,118 AUD
$785 USD
View
B+
Retailer 11
-
$1,123 AUD
$789 USD
View
B+
Retailer 12
-
$1,130 AUD
$794 USD
View
B+
Retailer 13
-
$1,189 AUD
$835 USD
View
B+
Retailer 14
-
$1,224 AUD
$860 USD
View
B+
Retailer 15
-
$1,224 AUD
$860 USD
View
B+
Retailer 16
-
$1,224 AUD
$860 USD
View
B+
Retailer 17
-
$1,267 AUD
$890 USD
View
B+
Retailer 18
-
$1,276 AUD
£706 GBP
View
B+
Retailer 19
-
$1,285 AUD
$902 USD
View
B+
Retailer 20
-
$1,360 AUD
$955 USD
View
B+
Retailer 21
-
$1,380 AUD
€923 EUR
View
B+
Retailer 22
-
$1,495 AUD
$1,050 USD
View
Retailer 23
-
$1,607 AUD
View
Price last confirmed 29 days ago
B
Retailer 24
-
$1,650 AUD
ZAR 18,719 ZAR
View
B
Retailer 25
-
$1,958 AUD
£1,083 GBP
View
B
Retailer 26
-
$3,082 AUD
CA$3,007 CAD
View
Most Expensive
B
NZ Jewellers
9b665b45-e3d4-40e8-97cd-0319aba1d27e · Oct 30
$3,351 AUD
$2,354 USD
View
26 more retailers have this diamond
Prices start from $749 AUDSave up to $2,602 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
0.55ct Round
$749 AUD