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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 $646 NZD
As of November 1, 2026
Save $1,145 NZD (64%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $2,973 NZD 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: $2,973 NZD|Low: $530 NZD|High: $2,973 NZD|Avg: $991 NZD|+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$646 NZD
Retailer 7$734 NZD
Retailer 16$776 NZD
Retailer 5$810 NZD
Retailer 2$823 NZD
Retailer 4$835 NZD
Retailer 6$835 NZD
Retailer 3$895 NZD
Retailer 12$895 NZD
Retailer 9$956 NZD
Retailer 14$1,010 NZD
Retailer 8$1,052 NZD
Retailer 13$1,057 NZD
Retailer 10$1,174 NZD
Retailer 11$1,791 NZD
NZ Jewellers$2,973 NZD

27 data points across 16 retailers

15 retailers$646 NZD to $1,791 NZD

Retailer 1
-
$637 NZD
Price last confirmed 28 days ago
B+
Retailer 2
-
$646 NZD
View
B+
Retailer 3
-
$776 NZD
View
Retailer 4
-
$810 NZD
View
Price last confirmed 10 days ago
B+
Retailer 5
-
$823 NZD
View
Retailer 6
-
$835 NZD
View
Price last confirmed 8 days ago
Retailer 7
-
$835 NZD
View
Price last confirmed 9 days ago
B+
Retailer 8
-
$895 NZD
View
B+
Retailer 9
-
$895 NZD
View
B+
Retailer 10
-
$956 NZD
View
B+
Retailer 11
-
$1,010 NZD
View
B
Retailer 12
-
$1,057 NZD
View
B
Retailer 13
-
$1,174 NZD
View
C
Retailer 14
-
$1,791 NZD
View
Most Expensive
NZ Jewellers
366aec03-384d-4eb6-83a4-9caa37969dae · Oct 30
$2,973 NZD
$1,648 USD
View
Price last confirmed 7 days ago
14 more retailers have this diamond
Prices start from $646 NZDSave up to $1,145 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.

B+
0.51ct Round
$646 NZD