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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 $601 NZD
As of November 5, 2026
Save $1,703 NZD (74%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $2,304 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 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 $601 to $2,304, a $1,703 spread on the same certified stone. NZ Jewellers lists it at $2,304. 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: $2,304 NZD|Low: $601 NZD|High: $2,347 NZD|Avg: $982 NZD|-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$601 NZD
Retailer 8$648 NZD
Retailer 3$658 NZD
Retailer 9$669 NZD
Retailer 7$718 NZD
Retailer 2$763 NZD
Retailer 10$808 NZD
Retailer 4$864 NZD
Retailer 12$961 NZD
Retailer 5$1,111 NZD
Retailer 6$1,385 NZD
NZ Jewellers$2,304 NZD

44 data points across 12 retailers

11 retailers$601 NZD to $2,304 NZD

A
Cheapest Retailer
-
$601 NZD
Retailer 2
-
$648 NZD
View
Price last confirmed 8 days ago
A
Retailer 3
-
$669 NZD
View
A
Retailer 4
-
$718 NZD
View
A
Retailer 5
-
$763 NZD
View
B+
Retailer 6
-
$808 NZD
View
B+
Retailer 7
-
$864 NZD
View
B+
Retailer 8
-
$961 NZD
View
B+
Retailer 9
-
$1,111 NZD
View
B+
Retailer 10
-
$1,385 NZD
View
Most Expensive
C
NZ Jewellers
fef7c7c6-ef8f-4fad-bd92-ac9859a163fb · Nov 4
$2,304 NZD
$1,277 USD
View
10 more retailers have this diamond
Prices start from $601 NZDSave up to $1,703 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.

A
0.51ct Round
$601 NZD