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Round|Natural|GIA

0.51ct K SI2 Round Natural Diamond

VG • K/SI2 • GIA 1345916805

Certificate GIA 1345916805

Diamond specifications and retailer prices

From $511 AUD
As of November 1, 2026
Save $907 AUD (64%) vs most expensive(unlock to see where)
15 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 1345916805. Listed at 15 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
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1345916805
Dimensions5.21 × 5.14 × 3.08 mm
L/W Ratio1.01
Key to symbols
Crystal
Top View
5.21 mm5.14 mm0.51 ctK / SI2
OriginNatural
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 1345916805
Side View
Table 63.0%CrownGirdle: ThickPavilionCulet: NoneDepth 59.6%

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: $785 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

15 retailers$511 AUD to $1,419 AUD

Retailer 1
-
$504 AUD
Price last confirmed 28 days ago
B+
Retailer 2
-
$511 AUD
View
B+
Retailer 3
-
$614 AUD
View
Retailer 4
-
$641 AUD
View
Price last confirmed 10 days ago
B+
Retailer 5
-
$651 AUD
View
Retailer 6
-
$661 AUD
View
Price last confirmed 8 days ago
Retailer 7
-
$661 AUD
View
Price last confirmed 9 days ago
B+
Retailer 8
-
$709 AUD
View
B+
Retailer 9
-
$709 AUD
View
B+
Retailer 10
-
$757 AUD
View
B+
Retailer 11
-
$800 AUD
View
B
Retailer 12
-
$837 AUD
View
B
Retailer 13
-
$930 AUD
View
C
Retailer 14
-
$1,419 AUD
View
Most Expensive
NZ Jewellers
366aec03-384d-4eb6-83a4-9caa37969dae · Oct 30
$2,354 AUD
$1,648 USD
View
Price last confirmed 7 days ago
14 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