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Oval|Natural|IGI

0.51ct K SI1 Oval Natural Diamond

VG • K/SI1 • IGI 815656298

Shape and cutting style on the report: Oval brilliant

Certificate IGI 815656298

Diamond specifications and retailer prices

From $555 AUD
As of November 5, 2026
Save $1,784 AUD (76%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $2,339 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 SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 815656298. Listed at 15 retailers as of November 5, 2026, with prices from $555 to $2,339, a $1,784 spread on the same certified stone. NZ Jewellers lists it at $2,339. 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
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle39.5°
Pavilion angle35.6°
OriginNatural
Grading LabIGI
CertificateIGI 815656298
Dimensions6.30 × 4.40 × 2.75 mm
L/W Ratio1.43
Girdle conditionFaceted
Top View
6.30 mm4.40 mm0.51 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 815656298
Side View
Table 58.0%Crown 39.5°Girdle: MED-THKPavilion 35.6°Culet: NoneDepth 62.5%

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: $2,339 AUD|Low: $555 AUD|High: $2,390 AUD|Avg: $917 AUD|-2.1%
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
November 6, 2026
Retailer 11$555 AUD
Retailer 7$568 AUD
Retailer 12$610 AUD
Retailer 13$658 AUD
Retailer 6$664 AUD
Retailer 10$704 AUD
Retailer 9$707 AUD
Retailer 3$713 AUD
Retailer 2$744 AUD
Retailer 5$843 AUD
Retailer 14$940 AUD
Retailer 15$947 AUD
Retailer 8$984 AUD
Retailer 4$1,412 AUD
NZ Jewellers$2,339 AUD

18 data points across 15 retailers

15 retailers$555 AUD to $2,339 AUD

A
Cheapest Retailer
-
$555 AUD
Retailer 2
-
$568 AUD
View
Price last confirmed 9 days ago
A
Retailer 3
-
$610 AUD
View
A
Retailer 4
-
$658 AUD
View
Retailer 5
-
$664 AUD
View
Price last confirmed 8 days ago
B+
Retailer 6
-
$704 AUD
View
B+
Retailer 7
-
$707 AUD
View
B+
Retailer 8
-
$713 AUD
View
B+
Retailer 9
-
$744 AUD
View
B+
Retailer 10
-
$843 AUD
View
B
Retailer 11
-
$940 AUD
View
B
Retailer 12
-
$947 AUD
View
B
Retailer 13
-
$984 AUD
View
B
Retailer 14
-
$1,412 AUD
View
Most Expensive
C
NZ Jewellers
d3d89fb4-5f5c-4fd9-8d0d-1a0c11664320 · Nov 5
$2,339 AUD
$1,607 USD
View
14 more retailers have this diamond
Prices start from $555 AUDSave up to $1,784 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
$555 AUD