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Round|Natural|GIA

0.55ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 2556999425

Certificate GIA 2556999425

Diamond specifications and retailer prices

From $617 AUD
As of November 6, 2026
Save $2,033 AUD (77%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $2,650 AUD at NZ Jewellers · As of November 6, 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 J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2556999425. Listed at 16 retailers as of November 6, 2026, with prices from $617 to $2,650, a $2,033 spread on the same certified stone. NZ Jewellers lists it at $2,650. 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
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2556999425
Dimensions5.22 × 5.26 × 3.24 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Top View
5.22 mm5.26 mm0.55 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556999425
Side View
Table 59.0%Crown 35.5°Girdle: MED-STKPavilion 41°Culet: NoneDepth 61.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $1,030 AUD|Low: $530 AUD|High: $1,975 AUD|Avg: $1,049 AUD|+3.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 7, 2026
Retailer 3$617 AUD
Retailer 5$779 AUD
Retailer 6$910 AUD
Retailer 7$975 AUD
Retailer 1$1,030 AUD
Retailer 2$1,125 AUD
Retailer 4$1,952 AUD

42 data points across 7 retailers

16 retailers$617 AUD to $2,650 AUD

A
Cheapest Retailer
-
$617 AUD
A
Retailer 2
-
$779 AUD
View
Final sale: no returns
Retailer 3
-
$846 AUD
View
Price last confirmed 45 days ago
Retailer 4
-
$846 AUD
View
Price last confirmed 61 days ago
B+
Retailer 5
-
$846 AUD
View
Retailer 6
-
$875 AUD
View
Price last confirmed 11 days ago
B+
Retailer 7
-
$910 AUD
View
Retailer 8
-
$975 AUD
View
Price last confirmed 61 days ago
Retailer 9
-
$975 AUD
View
Price last confirmed 46 days ago
B+
Retailer 10
-
$975 AUD
View
B+
Retailer 11
-
$1,030 AUD
View
B+
Retailer 12
-
$1,125 AUD
View
B
Retailer 13
-
$1,952 AUD
View
Retailer 14
-
$2,650 AUD
View
Price last confirmed 47 days ago
Retailer 15
-
$2,650 AUD
View
Price last confirmed 70 days ago
Most Expensive
B
NZ Jewellers
bbb91b0d-06a8-4b1f-942b-677ca9ea70bc · Nov 6
$2,650 AUD
$1,821 USD
View
15 more retailers have this diamond
Prices start from $617 AUDSave up to $2,033 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
$617 AUD