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Round|Natural|GIA

1.05ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 1555614721

Certificate GIA 1555614721

Diamond specifications and retailer prices

From $3,240 AUD
As of November 6, 2026
Save $5,035 AUD (61%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $8,275 AUD at NZ Jewellers · As of November 5, 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 1555614721. Listed at 21 retailers as of November 5, 2026, with prices from $3,240 to $8,275, a $5,035 spread on the same certified stone. NZ Jewellers lists it at $8,275. 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°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 1555614721
Dimensions6.51 × 6.53 × 4.04 mm
L/W Ratio1.00
Girdle conditionSlightly Thick
Culet sizeNone
Key to symbols
Feather, Crystal, Needle, Cloud
Top View
6.51 mm6.53 mm1.05 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1555614721
Side View
Table 56.0%Crown 35°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.9%

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: $8,275 AUD|Low: $3,034 AUD|High: $8,275 AUD|Avg: $4,414 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
Retailer 14
Retailer 15
Retailer 16
November 6, 2026
Retailer 7$3,240 AUD
Retailer 5$3,243 AUD
Retailer 6$3,310 AUD
Retailer 14$3,586 AUD
Retailer 16$3,586 AUD
Retailer 15$3,751 AUD
Retailer 9$3,784 AUD
Retailer 4$4,067 AUD
Retailer 3$4,138 AUD
Retailer 2$4,140 AUD
Retailer 8$4,434 AUD
Retailer 13$4,620 AUD
Retailer 10$4,661 AUD
Retailer 11$4,831 AUD
Retailer 12$6,917 AUD
NZ Jewellers$8,275 AUD

31 data points across 16 retailers

21 retailers$3,240 AUD to $8,275 AUD

A
Cheapest Retailer
-
$3,240 AUD
A
Retailer 2
-
$3,243 AUD
View
A
Retailer 3
-
$3,310 AUD
View
Final sale: no returns
A
Retailer 4
-
$3,453 AUD
View
A
Retailer 5
-
$3,586 AUD
View
Retailer 6
-
$3,586 AUD
View
Price last confirmed 8 days ago
B+
Retailer 7
-
$3,647 AUD
View
B+
Retailer 8
-
$3,751 AUD
View
B+
Retailer 9
-
$3,753 AUD
View
B+
Retailer 10
-
$3,784 AUD
View
B+
Retailer 11
-
$4,067 AUD
View
B+
Retailer 12
-
$4,138 AUD
View
B+
Retailer 13
-
$4,140 AUD
View
B+
Retailer 14
-
$4,428 AUD
View
Retailer 15
-
$4,434 AUD
View
Price last confirmed 30 days ago
B+
Retailer 16
-
$4,518 AUD
View
B+
Retailer 17
-
$4,620 AUD
View
B+
Retailer 18
-
$4,661 AUD
View
B
Retailer 19
-
$4,831 AUD
View
B
Retailer 20
-
$6,917 AUD
View
Most Expensive
B
NZ Jewellers
e8e9a1de-dcce-42c5-84ec-6cec898aa17c · Nov 5
$8,275 AUD
$5,793 USD
View
20 more retailers have this diamond
Prices start from $3,240 AUDSave up to $5,035 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
$3,240 AUD