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Round|Natural|GIA

0.51ct K SI2 Round Natural Diamond

VG • K/SI2 • GIA 5346811814

Certificate GIA 5346811814

Diamond specifications and retailer prices

From $511 AUD
As of November 1, 2026
Save $907 AUD (64%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $2,354 AUD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 0.51ct natural round diamond

This 0.51ct natural round sits in the half to three-quarter carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a very-good cut grade and certified by GIA 5346811814. Listed at 14 retailers as of November 1, 2026, with a 177% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

0.51
Carat
K
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 5346811814
Dimensions5.03 × 5.02 × 3.18 mm
L/W Ratio1.00
Top View
5.03 mm5.02 mm0.51 ctK / SI2
OriginNatural
CutVery Good
PolishVery Good
SymmetryExcellent
FluorescenceFaint
CertificateGIA 5346811814
Side View
Table 57.0%CrownGirdle: ThickPavilionCulet: NoneDepth 63.3%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $2,354 AUD|Low: $420 AUD|High: $2,354 AUD|Avg: $782 AUD|+21.8%
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 2, 2026
Retailer 15$511 AUD
Retailer 7$581 AUD
Retailer 16$614 AUD
Retailer 5$641 AUD
Retailer 2$651 AUD
Retailer 4$661 AUD
Retailer 6$661 AUD
Retailer 3$709 AUD
Retailer 12$709 AUD
Retailer 9$757 AUD
Retailer 14$800 AUD
Retailer 8$833 AUD
Retailer 13$837 AUD
Retailer 10$930 AUD
Retailer 11$1,419 AUD
NZ Jewellers$2,354 AUD

27 data points across 16 retailers

14 retailers$511 AUD to $1,419 AUD

B+
Cheapest Retailer
-
$511 AUD
B+
Retailer 2
-
$614 AUD
View
Retailer 3
-
$641 AUD
View
Price last confirmed 10 days ago
B+
Retailer 4
-
$651 AUD
View
Retailer 5
-
$661 AUD
View
Price last confirmed 9 days ago
Retailer 6
-
$661 AUD
View
Price last confirmed 8 days ago
B+
Retailer 7
-
$709 AUD
View
B+
Retailer 8
-
$709 AUD
View
B+
Retailer 9
-
$757 AUD
View
B+
Retailer 10
-
$800 AUD
View
B+
Retailer 11
-
$837 AUD
View
B+
Retailer 12
-
$930 AUD
View
C
Retailer 13
-
$1,419 AUD
View
Most Expensive
NZ Jewellers
5376c492-65e5-4558-8922-18efc4022242 · Oct 30
$2,354 AUD
$1,648 USD
View
Price last confirmed 7 days ago
13 more retailers have this diamond
Prices start from $511 AUDSave up to $907 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.

B+
0.51ct Round
$511 AUD