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 $381 USD
As of November 5, 2026
Save $1,226 USD (76%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,607 USD 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 $381 to $1,607, a $1,226 spread on the same certified stone. NZ Jewellers lists it at $1,607. 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
Color
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: $1,607 USD|Low: $381 USD|High: $1,642 USD|Avg: $630 USD|-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$381 USD
Retailer 7$390 USD
Retailer 12$419 USD
Retailer 13$452 USD
Retailer 6$456 USD
Retailer 10$484 USD
Retailer 9$486 USD
Retailer 3$490 USD
Retailer 2$511 USD
Retailer 5$579 USD
Retailer 14$646 USD
Retailer 15$651 USD
Retailer 8$676 USD
Retailer 4$970 USD
NZ Jewellers$1,607 USD

18 data points across 15 retailers

15 retailers$381 USD to $1,607 USD

A
Cheapest Retailer
-
$381 USD
Retailer 2
-
$390 USD
View
Price last confirmed 9 days ago
A
Retailer 3
-
$419 USD
View
A
Retailer 4
-
$452 USD
View
Retailer 5
-
$456 USD
View
Price last confirmed 8 days ago
B+
Retailer 6
-
$484 USD
View
B+
Retailer 7
-
$486 USD
View
B+
Retailer 8
-
$490 USD
View
B+
Retailer 9
-
$511 USD
View
B+
Retailer 10
-
$579 USD
View
B
Retailer 11
-
$646 USD
View
B
Retailer 12
-
$651 USD
View
B
Retailer 13
-
$676 USD
View
B
Retailer 14
-
$970 USD
View
Most Expensive
C
NZ Jewellers
d3d89fb4-5f5c-4fd9-8d0d-1a0c11664320 · Nov 5
$1,607 USD
View
14 more retailers have this diamond
Prices start from $381 USDSave up to $1,226 USD

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
$381 USD