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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 €328 EUR
As of November 5, 2026
Save €930 EUR (74%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: €1,258 EUR 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 €328 to €1,258, a €930 spread on the same certified stone. NZ Jewellers lists it at €1,258. 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: €1,258 EUR|Low: €328 EUR|High: €1,258 EUR|Avg: €525 EUR
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 5, 2026
Retailer 5€328 EUR
Retailer 4€354 EUR
Retailer 3€366 EUR
Retailer 7€369 EUR
Retailer 6€442 EUR
Retailer 2€596 EUR
NZ Jewellers€1,258 EUR

19 data points across 7 retailers

6 retailers€328 EUR to €1,258 EUR

B+
Cheapest Retailer
-
€328 EUR
Retailer 2
-
€354 EUR
View
Price last confirmed 8 days ago
B+
Retailer 3
-
€366 EUR
View
B
Retailer 4
-
€442 EUR
View
B
Retailer 5
-
€596 EUR
View
Most Expensive
C
NZ Jewellers
4aa39cd8-961c-43bb-bd2b-a639e88a2684 · Nov 4
€1,258 EUR
$1,412 USD
View
5 more retailers have this diamond
Prices start from €328 EURSave up to €930 EUR

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
€328 EUR