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Round|Natural|GIA

0.51ct K I2 Round Natural Diamond

EX • K/I2 • GIA 6435018245

Certificate GIA 6435018245

Diamond specifications and retailer prices

From $655 NZD
As of November 5, 2026
Save $1,857 NZD (74%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $2,512 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 I2 clarity (included), with a top-tier cut grade and certified by GIA 6435018245. Listed at 6 retailers as of November 4, 2026, with prices from $655 to $2,512, a $1,857 spread on the same certified stone. NZ Jewellers lists it at $2,512. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

0.51
Carat
K
Colour
I2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 6435018245
Dimensions5.18 × 5.22 × 3.12 mm
L/W Ratio1.01
Top View
5.18 mm5.22 mm0.51 ctK / I2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6435018245
Side View
Table 59.0%Crown 33.5°GirdlePavilion 40.8°Culet: NoneDepth 59.9%

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: $2,512 NZD|Low: $655 NZD|High: $2,512 NZD|Avg: $1,049 NZD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 5, 2026
Retailer 5$655 NZD
Retailer 4$706 NZD
Retailer 3$731 NZD
Retailer 7$736 NZD
Retailer 6$882 NZD
Retailer 2$1,190 NZD
NZ Jewellers$2,512 NZD

19 data points across 7 retailers

6 retailers$655 NZD to $2,512 NZD

B+
Cheapest Retailer
-
$655 NZD
Retailer 2
-
$706 NZD
View
Price last confirmed 8 days ago
B+
Retailer 3
-
$731 NZD
View
B
Retailer 4
-
$882 NZD
View
B
Retailer 5
-
$1,190 NZD
View
Most Expensive
C
NZ Jewellers
4aa39cd8-961c-43bb-bd2b-a639e88a2684 · Nov 4
$2,512 NZD
$1,412 USD
View
5 more retailers have this diamond
Prices start from $655 NZDSave up to $1,857 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
$655 NZD