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0.51ct I SI2 Round Natural Diamond

EX • I/SI2 • IGI 670417121

Shape and cutting style on the report: Round brilliant

Certificate IGI 670417121

Diamond specifications and retailer prices

From $362 CAD
As of November 6, 2026
Save $1,564 CAD (81%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $1,926 CAD at NZ Jewellers · As of November 4, 2026
View at NZ Jewellers

About this 0.51ct natural round diamond

This 0.51ct natural round sits in the half to three-quarter carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 670417121. Listed at 12 retailers as of November 4, 2026, with prices from $362 to $1,926, a $1,564 spread on the same certified stone. NZ Jewellers lists it at $1,926. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

0.51
Carat
I
Color
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.6°
Pavilion angle41°
OriginNatural
Grading LabIGI
CertificateIGI 670417121
Dimensions5.10 × 5.05 × 3.18 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
5.10 mm5.05 mm0.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 670417121
Side View
Table 57.0%Crown 35.6°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.7%

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: $362 CAD|Low: $362 CAD|High: $1,173 CAD|Avg: $666 CAD|-1.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 1$362 CAD
Retailer 5$462 CAD
Retailer 3$517 CAD
Retailer 6$543 CAD
Retailer 7$709 CAD
Retailer 2$817 CAD
Retailer 4$1,159 CAD

44 data points across 7 retailers

12 retailers$362 CAD to $1,926 CAD

A
Cheapest Retailer
-
$362 CAD
A
Retailer 2
-
$462 CAD
View
Final sale: no returns
A
Retailer 3
-
$503 CAD
View
A
Retailer 4
-
$517 CAD
View
Retailer 5
-
$542 CAD
View
Price last confirmed 8 days ago
A
Retailer 6
-
$560 CAD
View
A
Retailer 7
-
$676 CAD
View
A
Retailer 8
-
$684 CAD
View
A
Retailer 9
-
$709 CAD
View
A
Retailer 10
-
$817 CAD
View
B+
Retailer 11
-
$1,159 CAD
View
Most Expensive
B
NZ Jewellers
027d91a0-08be-4dfe-9965-8ccb7e7514a0 · Nov 4
$1,926 CAD
$1,379 USD
View
11 more retailers have this diamond
Prices start from $362 CADSave up to $1,564 CAD

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 Round
$362 CAD