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Round|Natural|GIA

0.51ct K SI2 Round Natural Diamond

EX • K/SI2 • GIA 2397005218

Certificate GIA 2397005218

Diamond specifications and retailer prices

From €297 EUR
As of November 5, 2026
Save €841 EUR (74%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: €1,138 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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2397005218. Listed at 11 retailers as of November 4, 2026, with prices from €297 to €1,138, a €841 spread on the same certified stone. NZ Jewellers lists it at €1,138. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

0.51
Carat
K
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle36.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2397005218
Dimensions5.09 × 5.05 × 3.20 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
5.09 mm5.05 mm0.51 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2397005218
Side View
Table 56.0%Crown 36.5°Girdle: Sli. ThickPavilion 41°Culet: NoneDepth 63.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: €1,138 EUR|Low: €297 EUR|High: €1,159 EUR|Avg: €485 EUR|-1.8%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 11€297 EUR
Retailer 8€320 EUR
Retailer 3€325 EUR
Retailer 9€331 EUR
Retailer 7€355 EUR
Retailer 2€377 EUR
Retailer 10€399 EUR
Retailer 4€427 EUR
Retailer 12€475 EUR
Retailer 5€549 EUR
Retailer 6€684 EUR
NZ Jewellers€1,138 EUR

44 data points across 12 retailers

11 retailers€297 EUR to €1,138 EUR

A
Cheapest Retailer
-
€297 EUR
Retailer 2
-
€320 EUR
View
Price last confirmed 8 days ago
A
Retailer 3
-
€331 EUR
View
A
Retailer 4
-
€355 EUR
View
A
Retailer 5
-
€377 EUR
View
B+
Retailer 6
-
€399 EUR
View
B+
Retailer 7
-
€427 EUR
View
B+
Retailer 8
-
€475 EUR
View
B+
Retailer 9
-
€549 EUR
View
B+
Retailer 10
-
€684 EUR
View
Most Expensive
C
NZ Jewellers
fef7c7c6-ef8f-4fad-bd92-ac9859a163fb · Nov 4
€1,138 EUR
$1,277 USD
View
10 more retailers have this diamond
Prices start from €297 EURSave up to €841 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.

A
0.51ct Round
€297 EUR