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Round|Natural|GIA

0.45ct K SI1 Round Natural Diamond

VG • K/SI1 • GIA 6381753831

Certificate GIA 6381753831

Diamond specifications and retailer prices

From $457 AUD
As of November 4, 2026
Save $1,474 AUD (76%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,931 AUD at NZ Jewellers · As of November 4, 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 very-good cut grade and certified by GIA 6381753831. Listed at 15 retailers as of November 4, 2026, with prices from $457 to $1,931, a $1,474 spread on the same certified stone. NZ Jewellers lists it at $1,931. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.45
Carat
K
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle38.5°
Pavilion angle39.8°
OriginNatural
Grading LabGIA
CertificateGIA 6381753831
Dimensions4.80 × 4.77 × 3.09 mm
L/W Ratio1.01
Top View
4.80 mm4.77 mm0.45 ctK / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 6381753831
Side View
Table 55.0%Crown 38.5°Girdle: STK-THKPavilion 39.8°Culet: NoneDepth 64.6%

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 4
Current: $1,931 AUD|Low: $457 AUD|High: $1,931 AUD|Avg: $729 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 5, 2026
Retailer 5$457 AUD
Retailer 11$458 AUD
Retailer 16$492 AUD
Retailer 14$509 AUD
Retailer 8$553 AUD
Retailer 15$585 AUD
Retailer 7$589 AUD
Retailer 6$614 AUD
Retailer 4$633 AUD
Retailer 3$693 AUD
Retailer 9$748 AUD
Retailer 13$779 AUD
Retailer 10$784 AUD
Retailer 2$926 AUD
Retailer 12$1,161 AUD
NZ Jewellers$1,931 AUD

33 data points across 16 retailers

15 retailers$457 AUD to $1,931 AUD

A
Cheapest Retailer
-
$457 AUD
A
Retailer 2
-
$458 AUD
View
Retailer 3
-
$492 AUD
View
Price last confirmed 8 days ago
B+
Retailer 4
-
$509 AUD
View
B+
Retailer 5
-
$585 AUD
View
B+
Retailer 6
-
$589 AUD
View
B+
Retailer 7
-
$614 AUD
View
B+
Retailer 8
-
$633 AUD
View
B+
Retailer 9
-
$693 AUD
View
B+
Retailer 10
-
$748 AUD
View
B
Retailer 11
-
$779 AUD
View
B+
Retailer 12
-
$784 AUD
View
B
Retailer 13
-
$926 AUD
View
B
Retailer 14
-
$1,161 AUD
View
Most Expensive
C
NZ Jewellers
4b62d1b1-7972-4fc0-8517-acb5d204728c · Nov 4
$1,931 AUD
$1,327 USD
View
14 more retailers have this diamond
Prices start from $457 AUDSave up to $1,474 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
$457 AUD