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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 $476 AUD
As of November 5, 2026
Save $1,349 AUD (74%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $1,824 AUD 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 $476 to $1,824, a $1,349 spread on the same certified stone. NZ Jewellers lists it at $1,824. 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: $1,824 AUD|Low: $476 AUD|High: $1,858 AUD|Avg: $778 AUD|-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$476 AUD
Retailer 8$513 AUD
Retailer 3$521 AUD
Retailer 9$530 AUD
Retailer 7$569 AUD
Retailer 2$604 AUD
Retailer 10$640 AUD
Retailer 4$684 AUD
Retailer 12$761 AUD
Retailer 5$880 AUD
Retailer 6$1,097 AUD
NZ Jewellers$1,824 AUD

44 data points across 12 retailers

11 retailers$476 AUD to $1,824 AUD

A
Cheapest Retailer
-
$476 AUD
Retailer 2
-
$513 AUD
View
Price last confirmed 8 days ago
A
Retailer 3
-
$530 AUD
View
A
Retailer 4
-
$569 AUD
View
A
Retailer 5
-
$604 AUD
View
B+
Retailer 6
-
$640 AUD
View
B+
Retailer 7
-
$684 AUD
View
B+
Retailer 8
-
$761 AUD
View
B+
Retailer 9
-
$880 AUD
View
B+
Retailer 10
-
$1,097 AUD
View
Most Expensive
C
NZ Jewellers
fef7c7c6-ef8f-4fad-bd92-ac9859a163fb · Nov 4
$1,824 AUD
$1,277 USD
View
10 more retailers have this diamond
Prices start from $476 AUDSave up to $1,349 AUD

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
$476 AUD