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Round|Natural|GIA

1.05ct F SI1 Round Natural Diamond

EX • F/SI1 • GIA 7553989852

Certificate GIA 7553989852

Diamond specifications and retailer prices

From $3,585 AUD
As of November 6, 2026
Save $1,105 AUD (24%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $5,162 AUD at Blue Nile · As of October 27, 2026
View at Blue Nile

About this 1.05ct natural round diamond

This 1.05ct natural round sits in the classic one-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 7553989852. Listed at 6 retailers as of November 6, 2026, with a 31% 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
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 7553989852
Dimensions6.44 × 6.48 × 4.03 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Needle
Top View
6.44 mm6.48 mm1.05 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7553989852
Side View
Table 57.0%Crown 35.5°Girdle: Slightly ThickPavilion 40.6°Culet: NoneDepth 62.4%

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: $5,162 AUD|Low: $3,585 AUD|High: $5,283 AUD|Avg: $4,628 AUD|-2.3%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 2$3,585 AUD
Retailer 3$4,614 AUD
Retailer 5$4,689 AUD
Retailer 4$5,004 AUD
Blue Nile$5,162 AUD

45 data points across 5 retailers

6 retailers$3,585 AUD to $4,689 AUD

A
Cheapest Retailer
-
$3,585 AUD
Retailer 2
-
$4,456 AUD
View
Price last confirmed 12 days ago
Retailer 3
-
$4,614 AUD
View
Price last confirmed 10 days ago
B+
Retailer 4
-
$4,689 AUD
View
Retailer 5
-
$5,004 AUD
View
Price last confirmed 11 days ago
Most Expensive
Blue Nile
29980862 · Oct 27
$5,162 AUD
$3,547 USD
View
Price last confirmed 10 days ago
5 more retailers have this diamond
Prices start from $3,585 AUDSave up to $1,105 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
$3,585 AUD