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Round|Natural|GIA

0.45ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 5453558823

Certificate GIA 5453558823

Diamond specifications and retailer prices

From $310 AUD
As of November 6, 2026
Save $712 AUD (70%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $1,746 AUD at NZ Jewellers · As of September 28, 2026
View at NZ Jewellers

About this 0.45ct natural round diamond

This 0.45ct natural round sits in the sub-half-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5453558823. Listed at 13 retailers as of November 4, 2026, with a 230% 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

0.45
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 5453558823
Dimensions4.94 × 4.97 × 3.00 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather
Top View
4.94 mm4.97 mm0.45 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 5453558823
Side View
Table 60.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 60.5%

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: $310 AUD|Low: $278 AUD|High: $1,029 AUD|Avg: $554 AUD|+7.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 1$310 AUD
Retailer 3$403 AUD
Retailer 4$403 AUD
Retailer 2$405 AUD
Retailer 12$448 AUD
Retailer 11$511 AUD
Retailer 5$559 AUD
Retailer 6$610 AUD
Retailer 8$690 AUD
Retailer 7$734 AUD
Retailer 10$771 AUD
Retailer 9$1,022 AUD

32 data points across 12 retailers

13 retailers$310 AUD to $1,022 AUD

A
Cheapest Retailer
-
$310 AUD
Retailer 2
-
$335 AUD
View
Price last confirmed 38 days ago
Retailer 3
-
$375 AUD
View
Price last confirmed 36 days ago
Retailer 4
-
$418 AUD
View
Price last confirmed 38 days ago
Retailer 5
-
$511 AUD
View
Price last confirmed 38 days ago
A
Retailer 6
-
$511 AUD
View
B+
Retailer 7
-
$559 AUD
View
B+
Retailer 8
-
$610 AUD
View
B+
Retailer 9
-
$690 AUD
View
B+
Retailer 10
-
$734 AUD
View
B+
Retailer 11
-
$771 AUD
View
B
Retailer 12
-
$1,022 AUD
View
Most Expensive
NZ Jewellers
c916847f-3a29-41ba-912d-bc606e888b4f · Sep 28
$1,746 AUD
$1,200 USD
View
Price last confirmed 39 days ago
12 more retailers have this diamond
Prices start from $310 AUDSave up to $712 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
0.45ct Round
$310 AUD