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Round|Natural|GIA

0.45ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 6445993327

Certificate GIA 6445993327

Diamond specifications and retailer prices

From $259 AUD
As of November 6, 2026
Save $579 AUD (69%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $1,943 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 6445993327. Listed at 17 retailers as of November 4, 2026, with a 224% 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
SymmetryVery Good
FluorescenceFaint
Crown angle33.5°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 6445993327
Dimensions4.91 × 4.85 × 3.03 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Top View
4.91 mm4.85 mm0.45 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6445993327
Side View
Table 61.0%Crown 33.5°Girdle: MED-STKPavilion 41.8°Culet: NoneDepth 62.1%

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: $259 AUD|Low: $259 AUD|High: $915 AUD|Avg: $511 AUD|-11.9%
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
November 6, 2026
Retailer 1$259 AUD
Retailer 10$282 AUD
Retailer 4$316 AUD
Retailer 6$397 AUD
Retailer 2$442 AUD
Retailer 5$495 AUD
Retailer 9$525 AUD
Retailer 12$553 AUD
Retailer 7$559 AUD
Retailer 3$560 AUD
Retailer 11$566 AUD
Retailer 8$639 AUD
Retailer 13$838 AUD

25 data points across 13 retailers

17 retailers$259 AUD to $838 AUD

A
Cheapest Retailer
-
$259 AUD
A
Retailer 2
-
$282 AUD
View
A
Retailer 3
-
$316 AUD
View
A
Retailer 4
-
$397 AUD
View
A
Retailer 5
-
$442 AUD
View
Retailer 6
-
$473 AUD
View
Price last confirmed 38 days ago
Retailer 7
-
$495 AUD
View
Price last confirmed 14 days ago
Retailer 8
-
$502 AUD
View
Price last confirmed 51 days ago
A
Retailer 9
-
$525 AUD
View
A
Retailer 10
-
$553 AUD
View
B+
Retailer 11
-
$559 AUD
View
A
Retailer 12
-
$560 AUD
View
A
Retailer 13
-
$566 AUD
View
Retailer 14
-
$572 AUD
View
Price last confirmed 38 days ago
A
Retailer 15
-
$639 AUD
View
B+
Retailer 16
-
$838 AUD
View
Most Expensive
NZ Jewellers
b6300624-bdf0-44b2-8c56-d6e8312c65ea · Sep 28
$1,943 AUD
$1,335 USD
View
Price last confirmed 39 days ago
16 more retailers have this diamond
Prices start from $259 AUDSave up to $579 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
$259 AUD