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Round|Natural|GIA

0.51ct K SI2 Round Natural Diamond

VG • K/SI2 • GIA 6291362550

Certificate GIA 6291362550

Diamond specifications and retailer prices

From $669 NZD
As of November 1, 2026
Save $1,127 NZD (63%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $2,984 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 6291362550. Listed at 14 retailers as of November 1, 2026, with a 168% 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 6291362550
Dimensions5.01 × 4.98 × 3.21 mm
L/W Ratio1.01
Top View
5.01 mm4.98 mm0.51 ctK / SI2
OriginNatural
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6291362550
Side View
Table 57.0%CrownGirdle: THN-THKPavilionCulet: NoneDepth 64.2%

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: $2,984 NZD|Low: $554 NZD|High: $2,984 NZD|Avg: $1,002 NZD|+21.7%
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$669 NZD
Retailer 7$738 NZD
Retailer 16$779 NZD
Retailer 5$814 NZD
Retailer 2$826 NZD
Retailer 4$839 NZD
Retailer 6$839 NZD
Retailer 3$898 NZD
Retailer 12$898 NZD
Retailer 9$960 NZD
Retailer 14$1,014 NZD
Retailer 8$1,055 NZD
Retailer 13$1,061 NZD
Retailer 10$1,178 NZD
Retailer 11$1,797 NZD
NZ Jewellers$2,984 NZD

26 data points across 16 retailers

14 retailers$669 NZD to $1,797 NZD

B+
Cheapest Retailer
-
$669 NZD
B+
Retailer 2
-
$779 NZD
View
Retailer 3
-
$814 NZD
View
Price last confirmed 10 days ago
B+
Retailer 4
-
$826 NZD
View
Retailer 5
-
$839 NZD
View
Price last confirmed 9 days ago
Retailer 6
-
$839 NZD
View
Price last confirmed 8 days ago
B+
Retailer 7
-
$898 NZD
View
B+
Retailer 8
-
$898 NZD
View
B+
Retailer 9
-
$960 NZD
View
B+
Retailer 10
-
$1,014 NZD
View
B
Retailer 11
-
$1,061 NZD
View
B
Retailer 12
-
$1,178 NZD
View
C
Retailer 13
-
$1,797 NZD
View
Most Expensive
NZ Jewellers
dd197ee9-5caf-4acd-8558-c99939f4f2f5 · Oct 30
$2,984 NZD
$1,654 USD
View
Price last confirmed 7 days ago
13 more retailers have this diamond
Prices start from $669 NZDSave up to $1,127 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
$669 NZD