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Oval|Natural|IGI

0.51ct K SI1 Oval Natural Diamond

VG • K/SI1 • IGI 815673855

Shape and cutting style on the report: Oval brilliant

Certificate IGI 815673855

Diamond specifications and retailer prices

From $470 AUD
As of November 6, 2026
Save $1,963 AUD (81%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $2,433 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 815673855. Listed at 14 retailers as of November 5, 2026, with prices from $470 to $2,433, a $1,963 spread on the same certified stone. NZ Jewellers lists it at $2,433. 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
SymmetryVery Good
FluorescenceNone
Crown angle30.7°
Pavilion angle40.4°
OriginNatural
Grading LabIGI
CertificateIGI 815673855
Dimensions6.30 × 4.62 × 2.77 mm
L/W Ratio1.36
Girdle conditionFaceted
Top View
6.30 mm4.62 mm0.51 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI 815673855
Side View
Table 60.0%Crown 30.7°Girdle: MED-THKPavilion 40.4°Culet: NoneDepth 60.0%

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: $2,433 AUD|Low: $470 AUD|High: $2,433 AUD|Avg: $908 AUD
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
November 6, 2026
Retailer 2$470 AUD
Retailer 13$635 AUD
Retailer 11$684 AUD
Retailer 12$684 AUD
Retailer 4$728 AUD
Retailer 3$732 AUD
Retailer 6$774 AUD
Retailer 8$811 AUD
Retailer 5$881 AUD
Retailer 9$984 AUD
Retailer 7$1,036 AUD
Retailer 10$1,463 AUD
NZ Jewellers$2,433 AUD

26 data points across 13 retailers

14 retailers$470 AUD to $2,433 AUD

A
Cheapest Retailer
-
$470 AUD
B+
Retailer 2
-
$635 AUD
View
B+
Retailer 3
-
$684 AUD
View
Retailer 4
-
$684 AUD
View
Price last confirmed 8 days ago
B+
Retailer 5
-
$728 AUD
View
B+
Retailer 6
-
$732 AUD
View
B+
Retailer 7
-
$774 AUD
View
B+
Retailer 8
-
$811 AUD
View
B+
Retailer 9
-
$825 AUD
View
B
Retailer 10
-
$881 AUD
View
B
Retailer 11
-
$984 AUD
View
B
Retailer 12
-
$1,036 AUD
View
B
Retailer 13
-
$1,463 AUD
View
Most Expensive
C
NZ Jewellers
f006e734-a583-408a-b002-81a75b2f699f · Nov 5
$2,433 AUD
$1,672 USD
View
13 more retailers have this diamond
Prices start from $470 AUDSave up to $1,963 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
$470 AUD