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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 $368 USD
As of November 5, 2026
Save $1,044 USD (74%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $1,412 USD 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 $368 to $1,412, a $1,044 spread on the same certified stone. NZ Jewellers lists it at $1,412. 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
Color
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: $1,412 USD|Low: $368 USD|High: $1,412 USD|Avg: $590 USD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 5, 2026
Retailer 5$368 USD
Retailer 4$397 USD
Retailer 3$411 USD
Retailer 7$414 USD
Retailer 6$496 USD
Retailer 2$669 USD
NZ Jewellers$1,412 USD

19 data points across 7 retailers

6 retailers$368 USD to $1,412 USD

B+
Cheapest Retailer
-
$368 USD
Retailer 2
-
$397 USD
View
Price last confirmed 8 days ago
B+
Retailer 3
-
$411 USD
View
B
Retailer 4
-
$496 USD
View
B
Retailer 5
-
$669 USD
View
Most Expensive
C
NZ Jewellers
4aa39cd8-961c-43bb-bd2b-a639e88a2684 · Nov 4
$1,412 USD
View
5 more retailers have this diamond
Prices start from $368 USDSave up to $1,044 USD

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
$368 USD