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Heart|Natural|GIA

1.21ct D SI1 Heart Natural Diamond

EX • D/SI1 • GIA 6442853900

Certificate GIA 6442853900

Diamond specifications and retailer prices

From $3,726 CAD
As of November 6, 2026
Save $4,236 CAD (53%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $7,962 CAD at MOH London · As of November 4, 2026
View at MOH London

About this 1.21ct natural heart diamond

This 1.21ct natural heart sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6442853900. Listed at 20 retailers as of November 4, 2026, with prices from $3,726 to $7,962, a $4,236 spread on the same certified stone. MOH London lists it at $7,962. 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

1.21
Carat
D
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle44.6°
Pavilion angle53.43°
OriginNatural
Grading LabGIA
CertificateGIA 6442853900
Dimensions5.94 × 5.77 × 4.03 mm
L/W Ratio1.03
Top View
5.94 mm5.77 mm1.21 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6442853900
Side View
Table 65.0%Crown 44.6°Girdle: MED-VTKPavilion 53.43°Culet: NoneDepth 69.8%

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: $7,962 CAD|Low: $3,726 CAD|High: $8,026 CAD|Avg: $5,135 CAD|-0.8%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 2$3,726 CAD
Retailer 10$3,744 CAD
Retailer 8$4,273 CAD
Retailer 11$4,625 CAD
Retailer 4$4,631 CAD
Retailer 9$4,943 CAD
Retailer 6$5,200 CAD
Retailer 3$5,501 CAD
Retailer 5$5,557 CAD
Retailer 7$5,826 CAD
MOH London$7,962 CAD

26 data points across 11 retailers

20 retailers$3,726 CAD to $7,962 CAD

A
Cheapest Retailer
-
$3,726 CAD
A
Retailer 2
-
$3,744 CAD
View
B+
Retailer 3
-
$4,238 CAD
View
B+
Retailer 4
-
$4,273 CAD
View
B+
Retailer 5
-
$4,405 CAD
View
Final sale: no returns
B+
Retailer 6
-
$4,607 CAD
View
B+
Retailer 7
-
$4,625 CAD
View
B+
Retailer 8
-
$4,631 CAD
View
Retailer 9
-
$4,774 CAD
View
Price last confirmed 8 days ago
B+
Retailer 10
-
$4,797 CAD
View
B+
Retailer 11
-
$4,943 CAD
View
B+
Retailer 12
-
$4,977 CAD
View
B+
Retailer 13
-
$5,067 CAD
View
Retailer 14
-
$5,099 CAD
View
Price last confirmed 30 days ago
B+
Retailer 15
-
$5,200 CAD
View
B+
Retailer 16
-
$5,557 CAD
View
B
Retailer 17
-
$5,826 CAD
View
B
Retailer 18
-
$7,037 CAD
View
B
Retailer 19
-
$7,233 CAD
View
Most Expensive
B
MOH London
52F0D1674 · Nov 4
$7,962 CAD
£4,457 GBP
View
19 more retailers have this diamond
Prices start from $3,726 CADSave up to $4,236 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
1.21ct Heart
$3,726 CAD