Round|Natural|GIA

0.51ct K SI2 Round Natural Diamond

EX • K/SI2 • GIA 2397005218

Certificate GIA 2397005218

Diamond specifications and retailer prices

From $333 USD
As of November 5, 2026
Save $944 USD (74%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $1,277 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 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 $333 to $1,277, a $944 spread on the same certified stone. NZ Jewellers lists it at $1,277. 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
Color
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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $1,277 USD|Low: $333 USD|High: $1,301 USD|Avg: $544 USD|-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$333 USD
Retailer 8$359 USD
Retailer 3$365 USD
Retailer 9$371 USD
Retailer 7$398 USD
Retailer 2$423 USD
Retailer 10$448 USD
Retailer 4$479 USD
Retailer 12$533 USD
Retailer 5$616 USD
Retailer 6$768 USD
NZ Jewellers$1,277 USD

44 data points across 12 retailers

11 retailers$333 USD to $1,277 USD

A
Cheapest Retailer
-
$333 USD
Retailer 2
-
$359 USD
View
Price last confirmed 8 days ago
A
Retailer 3
-
$371 USD
View
A
Retailer 4
-
$398 USD
View
A
Retailer 5
-
$423 USD
View
B+
Retailer 6
-
$448 USD
View
B+
Retailer 7
-
$479 USD
View
B+
Retailer 8
-
$533 USD
View
B+
Retailer 9
-
$616 USD
View
B+
Retailer 10
-
$768 USD
View
Most Expensive
C
NZ Jewellers
fef7c7c6-ef8f-4fad-bd92-ac9859a163fb · Nov 4
$1,277 USD
View
10 more retailers have this diamond
Prices start from $333 USDSave up to $944 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.

A
0.51ct Round
$333 USD