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1.51ct K SI1 Round Natural Diamond

EX • K/SI1 • IGI 623473316

Shape and cutting style on the report: Round brilliant

Certificate IGI 623473316

Diamond specifications and retailer prices

From $2,948 CAD
As of November 6, 2026
Save $3,877 CAD (57%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $6,825 CAD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 623473316. Listed at 15 retailers as of November 5, 2026, with prices from $2,948 to $6,825, a $3,877 spread on the same certified stone. NZ Jewellers lists it at $6,825. 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

1.51
Carat
K
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.4°
Pavilion angle41.1°
OriginNatural
Grading LabIGI
CertificateIGI 623473316
Dimensions7.48 × 7.44 × 4.51 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
7.48 mm7.44 mm1.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 623473316
Side View
Table 58.0%Crown 33.4°Girdle: MediumPavilion 41.1°Culet: NoneDepth 60.5%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $6,825 CAD|Low: $2,948 CAD|High: $7,100 CAD|Avg: $3,881 CAD|-3.9%
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 7$2,948 CAD
Retailer 10$2,982 CAD
Retailer 3$3,105 CAD
Retailer 6$3,261 CAD
Retailer 4$3,264 CAD
Retailer 5$3,264 CAD
Retailer 13$3,415 CAD
Retailer 11$3,459 CAD
Retailer 2$3,554 CAD
Retailer 8$3,588 CAD
Retailer 14$3,767 CAD
Retailer 9$3,984 CAD
Retailer 12$4,061 CAD
Retailer 15$5,716 CAD
NZ Jewellers$6,825 CAD

22 data points across 15 retailers

15 retailers$2,948 CAD to $6,825 CAD

A
Cheapest Retailer
-
$2,948 CAD
A
Retailer 2
-
$2,982 CAD
View
A
Retailer 3
-
$3,105 CAD
View
A
Retailer 4
-
$3,261 CAD
View
Retailer 5
-
$3,264 CAD
View
Price last confirmed 8 days ago
A
Retailer 6
-
$3,264 CAD
View
A
Retailer 7
-
$3,415 CAD
View
A
Retailer 8
-
$3,459 CAD
View
A
Retailer 9
-
$3,554 CAD
View
A
Retailer 10
-
$3,588 CAD
View
A
Retailer 11
-
$3,767 CAD
View
A
Retailer 12
-
$3,984 CAD
View
A
Retailer 13
-
$4,061 CAD
View
B+
Retailer 14
-
$5,716 CAD
View
Most Expensive
B
NZ Jewellers
64f18f7e-053e-4677-856d-c596d1f2dd3e · Nov 5
$6,825 CAD
$4,887 USD
View
14 more retailers have this diamond
Prices start from $2,948 CADSave up to $3,877 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
1.51ct Round
$2,948 CAD