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Oval|Natural|GIA

0.51ct K SI2 Oval Natural Diamond

VG • K/SI2 • GIA 5566616416

Certificate GIA 5566616416

Diamond specifications and retailer prices

From $399 AUD
As of November 6, 2026
Save $1,741 AUD (81%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $2,139 AUD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 0.51ct natural oval diamond

This 0.51ct natural oval sits in the half to three-quarter carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 5566616416. Listed at 17 retailers as of November 5, 2026, with prices from $399 to $2,139, a $1,741 spread on the same certified stone. NZ Jewellers lists it at $2,139. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.51
Carat
K
Colour
SI2
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5566616416
Dimensions6.45 × 4.40 × 2.80 mm
L/W Ratio1.47
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather
Top View
6.45 mm4.40 mm0.51 ctK / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 5566616416
Side View
Table 59.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 63.6%

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 6
Current: $2,139 AUD|Low: $399 AUD|High: $2,227 AUD|Avg: $783 AUD|-3.9%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
November 6, 2026
Retailer 2$399 AUD
Retailer 17$495 AUD
Retailer 13$502 AUD
Retailer 8$515 AUD
Retailer 3$543 AUD
Retailer 7$559 AUD
Retailer 5$601 AUD
Retailer 6$623 AUD
Retailer 14$646 AUD
Retailer 10$662 AUD
Retailer 11$716 AUD
Retailer 4$748 AUD
Retailer 9$751 AUD
Retailer 16$771 AUD
Retailer 15$1,017 AUD
Retailer 12$1,288 AUD
NZ Jewellers$2,139 AUD

21 data points across 17 retailers

17 retailers$399 AUD to $2,139 AUD

A
Cheapest Retailer
-
$399 AUD
A
Retailer 2
-
$495 AUD
View
A
Retailer 3
-
$502 AUD
View
A
Retailer 4
-
$515 AUD
View
Final sale: no returns
A
Retailer 5
-
$543 AUD
View
A
Retailer 6
-
$559 AUD
View
Retailer 7
-
$601 AUD
View
Price last confirmed 8 days ago
B+
Retailer 8
-
$623 AUD
View
A
Retailer 9
-
$646 AUD
View
A
Retailer 10
-
$662 AUD
View
B+
Retailer 11
-
$716 AUD
View
B+
Retailer 12
-
$748 AUD
View
B+
Retailer 13
-
$751 AUD
View
B+
Retailer 14
-
$771 AUD
View
B
Retailer 15
-
$1,017 AUD
View
B
Retailer 16
-
$1,288 AUD
View
Most Expensive
C
NZ Jewellers
050153ca-acf3-4ec1-accd-f670c23af8a1 · Nov 5
$2,139 AUD
$1,470 USD
View
16 more retailers have this diamond
Prices start from $399 AUDSave up to $1,741 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 Oval
$399 AUD