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0.51ct K SI2 Round Natural Diamond

EX • K/SI2 • IGI 670418814

Shape and cutting style on the report: Round brilliant

Certificate IGI 670418814

Diamond specifications and retailer prices

From $384 CAD
As of November 5, 2026
Save $1,356 CAD (78%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $1,740 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 K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 670418814. Listed at 13 retailers as of November 4, 2026, with prices from $384 to $1,740, a $1,356 spread on the same certified stone. NZ Jewellers lists it at $1,740. 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
K
Color
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle32.5°
Pavilion angle40.8°
OriginNatural
Grading LabIGI
CertificateIGI 670418814
Dimensions5.15 × 5.12 × 3.14 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
5.15 mm5.12 mm0.51 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI 670418814
Side View
Table 57.0%Crown 32.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.2%

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: $540 CAD|Low: $384 CAD|High: $897 CAD|Avg: $548 CAD|+5.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 5, 2026
Retailer 4$384 CAD
Retailer 6$398 CAD
Retailer 9$404 CAD
Retailer 11$413 CAD
Retailer 8$482 CAD
Retailer 1$540 CAD
Retailer 2$566 CAD
Retailer 10$566 CAD
Retailer 3$577 CAD
Retailer 12$628 CAD
Retailer 5$735 CAD
Retailer 7$887 CAD

23 data points across 12 retailers

13 retailers$384 CAD to $1,740 CAD

A
Cheapest Retailer
-
$384 CAD
A
Retailer 2
-
$398 CAD
View
Retailer 3
-
$413 CAD
View
Price last confirmed 8 days ago
A
Retailer 4
-
$429 CAD
View
Retailer 5
-
$482 CAD
View
Price last confirmed 42 days ago
Retailer 6
-
$517 CAD
View
Price last confirmed 63 days ago
B+
Retailer 7
-
$517 CAD
View
B+
Retailer 8
-
$540 CAD
View
B+
Retailer 9
-
$566 CAD
View
B+
Retailer 10
-
$735 CAD
View
B+
Retailer 11
-
$887 CAD
View
Retailer 12
-
$1,740 CAD
View
Price last confirmed 66 days ago
Most Expensive
C
NZ Jewellers
6f82cb98-7cb0-4025-b245-448f57a419c4 · Nov 4
$1,740 CAD
$1,246 USD
View
12 more retailers have this diamond
Prices start from $384 CADSave up to $1,356 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
$384 CAD