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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 $646 NZD
As of November 1, 2026
Save $1,136 NZD (64%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $2,957 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 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: $2,957 NZD|Low: $530 NZD|High: $2,957 NZD|Avg: $987 NZD|+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$646 NZD
Retailer 7$731 NZD
Retailer 16$772 NZD
Retailer 5$808 NZD
Retailer 2$819 NZD
Retailer 4$832 NZD
Retailer 6$832 NZD
Retailer 3$889 NZD
Retailer 12$889 NZD
Retailer 9$943 NZD
Retailer 14$1,007 NZD
Retailer 8$1,044 NZD
Retailer 13$1,053 NZD
Retailer 10$1,169 NZD
Retailer 11$1,782 NZD
NZ Jewellers$2,957 NZD

27 data points across 16 retailers

14 retailers$646 NZD to $1,782 NZD

B+
Cheapest Retailer
-
$646 NZD
B+
Retailer 2
-
$772 NZD
View
Retailer 3
-
$808 NZD
View
Price last confirmed 10 days ago
B+
Retailer 4
-
$819 NZD
View
Retailer 5
-
$832 NZD
View
Price last confirmed 9 days ago
Retailer 6
-
$832 NZD
View
Price last confirmed 8 days ago
B+
Retailer 7
-
$889 NZD
View
B+
Retailer 8
-
$889 NZD
View
B+
Retailer 9
-
$943 NZD
View
B+
Retailer 10
-
$1,007 NZD
View
B+
Retailer 11
-
$1,053 NZD
View
B+
Retailer 12
-
$1,169 NZD
View
C
Retailer 13
-
$1,782 NZD
View
Most Expensive
NZ Jewellers
87419fe6-6aae-416c-bd98-9d0f1c3e7582 · Oct 30
$2,957 NZD
$1,639 USD
View
Price last confirmed 7 days ago
13 more retailers have this diamond
Prices start from $646 NZDSave up to $1,136 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