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Round|Natural|GIA

0.51ct K SI2 Round Natural Diamond

VG • K/SI2 • GIA 2256287166

Certificate GIA 2256287166

Diamond specifications and retailer prices

From $511 AUD
As of November 1, 2026
Save $900 AUD (64%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $2,341 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 2256287166. Listed at 14 retailers as of November 1, 2026, with a 176% 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 2256287166
Dimensions5.04 × 5.02 × 3.19 mm
L/W Ratio1.00
Top View
5.04 mm5.02 mm0.51 ctK / SI2
OriginNatural
CutVery Good
PolishVery Good
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2256287166
Side View
Table 60.0%CrownGirdle: ThickPavilionCulet: NoneDepth 63.4%

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: $2,341 AUD|Low: $420 AUD|High: $2,341 AUD|Avg: $781 AUD|+21.9%
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$579 AUD
Retailer 16$611 AUD
Retailer 5$640 AUD
Retailer 2$649 AUD
Retailer 4$659 AUD
Retailer 6$659 AUD
Retailer 3$704 AUD
Retailer 12$704 AUD
Retailer 9$747 AUD
Retailer 14$797 AUD
Retailer 8$827 AUD
Retailer 13$834 AUD
Retailer 10$926 AUD
Retailer 11$1,411 AUD
NZ Jewellers$2,341 AUD

27 data points across 16 retailers

14 retailers$511 AUD to $1,411 AUD

B+
Cheapest Retailer
-
$511 AUD
B+
Retailer 2
-
$611 AUD
View
Retailer 3
-
$640 AUD
View
Price last confirmed 10 days ago
B+
Retailer 4
-
$649 AUD
View
Retailer 5
-
$659 AUD
View
Price last confirmed 9 days ago
Retailer 6
-
$659 AUD
View
Price last confirmed 8 days ago
B+
Retailer 7
-
$704 AUD
View
B+
Retailer 8
-
$704 AUD
View
B+
Retailer 9
-
$747 AUD
View
B+
Retailer 10
-
$797 AUD
View
B+
Retailer 11
-
$834 AUD
View
B+
Retailer 12
-
$926 AUD
View
C
Retailer 13
-
$1,411 AUD
View
Most Expensive
NZ Jewellers
87419fe6-6aae-416c-bd98-9d0f1c3e7582 · Oct 30
$2,341 AUD
$1,639 USD
View
Price last confirmed 7 days ago
13 more retailers have this diamond
Prices start from $511 AUDSave up to $900 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