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Round|Natural|GIA

0.45ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 6492856760

Certificate GIA 6492856760

Diamond specifications and retailer prices

From $377 NZD
As of November 6, 2026
Save $832 NZD (69%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $2,334 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 6492856760. Listed at 17 retailers as of November 4, 2026, with a 221% 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
FluorescenceFaint
Crown angle34°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 6492856760
Dimensions4.90 × 4.87 × 3.07 mm
L/W Ratio1.01
Star length45%
Lower girdle80%
Top View
4.90 mm4.87 mm0.45 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6492856760
Side View
Table 57.0%Crown 34°Girdle: MED-STKPavilion 41.6°Culet: NoneDepth 62.8%

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: $377 NZD|Low: $377 NZD|High: $1,236 NZD|Avg: $703 NZD|-10.3%
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$377 NZD
Retailer 10$413 NZD
Retailer 4$462 NZD
Retailer 5$554 NZD
Retailer 6$568 NZD
Retailer 2$621 NZD
Retailer 7$658 NZD
Retailer 9$732 NZD
Retailer 12$758 NZD
Retailer 11$815 NZD
Retailer 8$898 NZD
Retailer 3$929 NZD
Retailer 13$1,209 NZD

24 data points across 13 retailers

17 retailers$377 NZD to $1,209 NZD

A
Cheapest Retailer
-
$377 NZD
A
Retailer 2
-
$413 NZD
View
A
Retailer 3
-
$462 NZD
View
A
Retailer 4
-
$554 NZD
View
A
Retailer 5
-
$568 NZD
View
A
Retailer 6
-
$621 NZD
View
Retailer 7
-
$648 NZD
View
Price last confirmed 51 days ago
A
Retailer 8
-
$658 NZD
View
Retailer 9
-
$680 NZD
View
Price last confirmed 38 days ago
A
Retailer 10
-
$732 NZD
View
A
Retailer 11
-
$758 NZD
View
B+
Retailer 12
-
$815 NZD
View
Retailer 13
-
$821 NZD
View
Price last confirmed 38 days ago
B+
Retailer 14
-
$898 NZD
View
B+
Retailer 15
-
$929 NZD
View
B+
Retailer 16
-
$1,209 NZD
View
Most Expensive
NZ Jewellers
e999b532-bd93-40f3-bd9e-ca661baaf4aa · Sep 28
$2,334 NZD
$1,294 USD
View
Price last confirmed 39 days ago
16 more retailers have this diamond
Prices start from $377 NZDSave up to $832 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
$377 NZD