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Round|Natural|GIA

1.51ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 6491354443

Certificate GIA 6491354443

Diamond specifications and retailer prices

From $3,181 CAD
As of November 6, 2026
Save $3,955 CAD (55%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $7,455 CAD at NZ Jewellers · As of September 19, 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 GIA 6491354443. Listed at 16 retailers as of November 4, 2026, with a 124% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
FluorescenceFaint
Crown angle34.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 6491354443
Dimensions7.37 × 7.32 × 4.50 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Top View
7.37 mm7.32 mm1.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6491354443
Side View
Table 60.0%Crown 34.5°Girdle: ThickPavilion 40.8°Culet: NoneDepth 61.2%

Caratlytics Score

How it works →
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: $4,436 CAD|Low: $3,074 CAD|High: $7,241 CAD|Avg: $4,480 CAD
Retailer 1
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 11$3,181 CAD
Retailer 2$3,832 CAD
Retailer 3$3,834 CAD
Retailer 10$3,862 CAD
Retailer 13$3,945 CAD
Retailer 12$4,207 CAD
Retailer 4$4,279 CAD
Retailer 6$4,395 CAD
Retailer 1$4,436 CAD
Retailer 5$4,479 CAD
Retailer 7$4,970 CAD
Retailer 8$5,223 CAD
Retailer 9$7,137 CAD

43 data points across 13 retailers

16 retailers$3,181 CAD to $7,137 CAD

A
Cheapest Retailer
-
$3,181 CAD
A
Retailer 2
-
$3,832 CAD
View
A
Retailer 3
-
$3,834 CAD
View
A
Retailer 4
-
$3,862 CAD
View
A
Retailer 5
-
$3,945 CAD
View
A
Retailer 6
-
$4,207 CAD
View
Retailer 7
-
$4,279 CAD
View
Price last confirmed 49 days ago
Retailer 8
-
$4,279 CAD
View
Price last confirmed 25 days ago
A
Retailer 9
-
$4,395 CAD
View
A
Retailer 10
-
$4,436 CAD
View
A
Retailer 11
-
$4,479 CAD
View
Retailer 12
-
$4,937 CAD
View
Price last confirmed 48 days ago
A
Retailer 13
-
$4,970 CAD
View
B+
Retailer 14
-
$5,223 CAD
View
B
Retailer 15
-
$7,137 CAD
View
Most Expensive
NZ Jewellers
665bc02b-f100-4dc7-8719-186e063fbfef · Sep 19
$7,455 CAD
$5,338 USD
View
Price last confirmed 48 days ago
15 more retailers have this diamond
Prices start from $3,181 CADSave up to $3,955 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
$3,181 CAD