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Round|Natural|GIA

0.51ct K I1 Round Natural Diamond

GD • K/I1 • GIA 5316851317

Certificate GIA 5316851317

Diamond specifications and retailer prices

From $783 NZD
As of November 5, 2026
Save $511 NZD (39%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $3,311 NZD at NZ Jewellers · As of November 4, 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 I1 clarity (included), with a standard cut grade and certified by GIA 5316851317. Listed at 6 retailers as of November 4, 2026, with a 65% 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
I1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle38°
Pavilion angle40.4°
OriginNatural
Grading LabGIA
CertificateGIA 5316851317
Dimensions4.88 × 4.92 × 3.23 mm
L/W Ratio1.01
Star length45%
Lower girdle80%
Top View
4.88 mm4.92 mm0.51 ctK / I1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 5316851317
Side View
Table 58.0%Crown 38°Girdle: Very ThickPavilion 40.4°Culet: NoneDepth 65.9%

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 5
Current: $3,311 NZD|Low: $783 NZD|High: $3,311 NZD|Avg: $1,271 NZD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 1, 2026
Retailer 5$783 NZD
Retailer 3$843 NZD
Retailer 7$843 NZD
Retailer 6$902 NZD
Retailer 4$955 NZD
Retailer 8$1,098 NZD
Retailer 2$1,293 NZD
Retailer 9$1,297 NZD
NZ Jewellers$3,311 NZD

21 data points across 9 retailers

6 retailers$783 NZD to $1,293 NZD

B+
Cheapest Retailer
-
$783 NZD
Retailer 2
-
$843 NZD
View
Price last confirmed 8 days ago
B
Retailer 3
-
$843 NZD
View
B
Retailer 4
-
$902 NZD
View
B
Retailer 5
-
$1,293 NZD
View
Most Expensive
NZ Jewellers
291d9d8a-bb2e-4d3f-bfe6-df42239b9eb0 · Nov 4
$3,311 NZD
$1,861 USD
View
Price under review
5 more retailers have this diamond
Prices start from $783 NZDSave up to $511 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
$783 NZD