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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 $321 NZD
As of November 6, 2026
Save $718 NZD (69%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $2,408 NZD 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: $321 NZD|Low: $321 NZD|High: $1,135 NZD|Avg: $633 NZD|-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$321 NZD
Retailer 10$350 NZD
Retailer 4$391 NZD
Retailer 6$492 NZD
Retailer 2$548 NZD
Retailer 5$613 NZD
Retailer 9$651 NZD
Retailer 12$685 NZD
Retailer 7$693 NZD
Retailer 3$695 NZD
Retailer 11$702 NZD
Retailer 8$792 NZD
Retailer 13$1,039 NZD

25 data points across 13 retailers

17 retailers$321 NZD to $1,039 NZD

A
Cheapest Retailer
-
$321 NZD
A
Retailer 2
-
$350 NZD
View
A
Retailer 3
-
$391 NZD
View
A
Retailer 4
-
$492 NZD
View
A
Retailer 5
-
$548 NZD
View
Retailer 6
-
$586 NZD
View
Price last confirmed 38 days ago
Retailer 7
-
$613 NZD
View
Price last confirmed 14 days ago
Retailer 8
-
$622 NZD
View
Price last confirmed 51 days ago
A
Retailer 9
-
$651 NZD
View
A
Retailer 10
-
$685 NZD
View
B+
Retailer 11
-
$693 NZD
View
A
Retailer 12
-
$695 NZD
View
A
Retailer 13
-
$702 NZD
View
Retailer 14
-
$709 NZD
View
Price last confirmed 38 days ago
A
Retailer 15
-
$792 NZD
View
B+
Retailer 16
-
$1,039 NZD
View
Most Expensive
NZ Jewellers
b6300624-bdf0-44b2-8c56-d6e8312c65ea · Sep 28
$2,408 NZD
$1,335 USD
View
Price last confirmed 39 days ago
16 more retailers have this diamond
Prices start from $321 NZDSave up to $718 NZD

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
$321 NZD