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Heart|Natural|GIA

1.51ct K SI1 Heart Natural Diamond

EX • K/SI1 • GIA 6431871498

Certificate GIA 6431871498

Diamond specifications and retailer prices

From $3,042 CAD
As of November 4, 2026
Save $1,501 CAD (33%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $4,544 CAD at 77 Diamonds · As of November 6, 2026
View at 77 Diamonds

About this 1.51ct natural heart diamond

This 1.51ct natural heart 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 stated by the retailer rather than the lab and certified by GIA 6431871498. Listed at 8 retailers as of November 4, 2026, with prices from $3,042 to $4,544, a $1,501 spread on the same certified stone. 77 Diamonds lists it at $4,544. 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 (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.09°
Pavilion angle39.18°
OriginNatural
Grading LabGIA
CertificateGIA 6431871498
Dimensions6.82 × 8.06 × 4.63 mm
L/W Ratio1.18
Top View
6.82 mm8.06 mm1.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6431871498
Side View
Table 61.0%Crown 39.09°Girdle: MED-VTKPavilion 39.18°Culet: NoneDepth 57.4%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 4
Current: $4,544 CAD|Low: $3,003 CAD|High: $4,594 CAD|Avg: $3,621 CAD|+1.4%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 5$3,042 CAD
Retailer 7$3,092 CAD
Retailer 8$3,107 CAD
Retailer 6$3,242 CAD
Retailer 9$3,699 CAD
Retailer 3$3,729 CAD
Retailer 4$3,746 CAD
Retailer 2$4,436 CAD
77 Diamonds$4,544 CAD

42 data points across 9 retailers

8 retailers$3,042 CAD to $4,544 CAD

A
Cheapest Retailer
-
$3,042 CAD
A
Retailer 2
-
$3,092 CAD
View
A
Retailer 3
-
$3,107 CAD
View
A
Retailer 4
-
$3,242 CAD
View
A
Retailer 5
-
$3,729 CAD
View
A
Retailer 6
-
$3,746 CAD
View
A
Retailer 7
-
$4,436 CAD
View
Most Expensive
A
77 Diamonds
HSMBVVDQGGSS · Nov 6
$4,544 CAD
£2,543 GBP
View
7 more retailers have this diamond
Prices start from $3,042 CADSave up to $1,501 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 Heart
$3,042 CAD