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Round|Natural|GIA

1.05ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 2556452598

Certificate GIA 2556452598

Diamond specifications and retailer prices

From $2,468 AUD
As of November 6, 2026
Save $3,273 AUD (57%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $7,071 AUD at NZ Jewellers · As of September 19, 2026
View at NZ Jewellers

About this 1.05ct natural round diamond

This 1.05ct natural round sits in the classic one-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2556452598. Listed at 20 retailers as of November 2, 2026, with a 133% 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

1.05
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2556452598
Dimensions6.46 × 6.50 × 4.06 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Top View
6.46 mm6.50 mm1.05 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556452598
Side View
Table 57.0%Crown 35.5°Girdle: MED-STKPavilion 41°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 6
Current: $3,420 AUD|Low: $2,468 AUD|High: $5,995 AUD|Avg: $3,473 AUD|-1.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 6, 2026
Retailer 16$2,468 AUD
Retailer 5$2,513 AUD
Retailer 4$2,727 AUD
Retailer 11$2,810 AUD
Retailer 15$2,811 AUD
Retailer 2$2,990 AUD
Retailer 13$3,024 AUD
Retailer 6$3,238 AUD
Retailer 8$3,313 AUD
Retailer 1$3,420 AUD
Retailer 9$3,576 AUD
Retailer 10$3,764 AUD
Retailer 7$3,821 AUD
Retailer 14$3,858 AUD
Retailer 12$4,755 AUD
Retailer 3$5,741 AUD

30 data points across 16 retailers

20 retailers$2,468 AUD to $5,741 AUD

A
Cheapest Retailer
-
$2,468 AUD
Retailer 2
-
$2,513 AUD
View
Price last confirmed 17 days ago
Retailer 3
-
$2,727 AUD
View
Price last confirmed 11 days ago
A
Retailer 4
-
$2,810 AUD
View
A
Retailer 5
-
$2,811 AUD
View
A
Retailer 6
-
$2,990 AUD
View
A
Retailer 7
-
$3,024 AUD
View
Final sale: no returns
Retailer 8
-
$3,313 AUD
View
Price last confirmed 17 days ago
A
Retailer 9
-
$3,350 AUD
View
A
Retailer 10
-
$3,420 AUD
View
Retailer 11
-
$3,538 AUD
View
Price last confirmed 22 days ago
B+
Retailer 12
-
$3,576 AUD
View
B+
Retailer 13
-
$3,764 AUD
View
Retailer 14
-
$3,821 AUD
View
Price last confirmed 19 days ago
B+
Retailer 15
-
$3,858 AUD
View
Retailer 16
-
$3,903 AUD
View
Price last confirmed 48 days ago
B+
Retailer 17
-
$4,755 AUD
View
B
Retailer 18
-
$5,741 AUD
View
Retailer 19
-
$7,071 AUD
View
Price last confirmed 20 days ago
Most Expensive
NZ Jewellers
05f53ec0-77c7-4a2a-a7d4-89ef61e356d8 · Sep 19
$7,071 AUD
$4,950 USD
View
Price last confirmed 47 days ago
19 more retailers have this diamond
Prices start from $2,468 AUDSave up to $3,273 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
1.05ct Round
$2,468 AUD