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 $323 USD
As of November 6, 2026
Save $1,349 USD (81%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $1,672 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 815673855. Listed at 14 retailers as of November 5, 2026, with prices from $323 to $1,672, a $1,349 spread on the same certified stone. NZ Jewellers lists it at $1,672. 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
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: $1,672 USD|Low: $323 USD|High: $1,672 USD|Avg: $624 USD
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$323 USD
Retailer 13$436 USD
Retailer 11$470 USD
Retailer 12$470 USD
Retailer 4$500 USD
Retailer 3$503 USD
Retailer 6$532 USD
Retailer 8$557 USD
Retailer 5$605 USD
Retailer 9$676 USD
Retailer 7$712 USD
Retailer 10$1,005 USD
NZ Jewellers$1,672 USD

26 data points across 13 retailers

14 retailers$323 USD to $1,672 USD

A
Cheapest Retailer
-
$323 USD
B+
Retailer 2
-
$436 USD
View
B+
Retailer 3
-
$470 USD
View
Retailer 4
-
$470 USD
View
Price last confirmed 8 days ago
B+
Retailer 5
-
$500 USD
View
B+
Retailer 6
-
$503 USD
View
B+
Retailer 7
-
$532 USD
View
B+
Retailer 8
-
$557 USD
View
B+
Retailer 9
-
$567 USD
View
B
Retailer 10
-
$605 USD
View
B
Retailer 11
-
$676 USD
View
B
Retailer 12
-
$712 USD
View
B
Retailer 13
-
$1,005 USD
View
Most Expensive
C
NZ Jewellers
f006e734-a583-408a-b002-81a75b2f699f · Nov 5
$1,672 USD
View
13 more retailers have this diamond
Prices start from $323 USDSave up to $1,349 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
$323 USD