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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 €2,373 EUR
As of November 6, 2026
Save €2,697 EUR (53%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: €5,070 EUR 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 €2,373 to €5,070, a €2,697 spread on the same certified stone. MOH London lists it at €5,070. 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
Colour
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: €5,070 EUR|Low: €2,373 EUR|High: €5,111 EUR|Avg: €3,270 EUR|-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€2,373 EUR
Retailer 10€2,384 EUR
Retailer 8€2,721 EUR
Retailer 11€2,945 EUR
Retailer 4€2,949 EUR
Retailer 9€3,147 EUR
Retailer 6€3,311 EUR
Retailer 3€3,503 EUR
Retailer 5€3,539 EUR
Retailer 7€3,710 EUR
MOH London€5,070 EUR

26 data points across 11 retailers

20 retailers€2,373 EUR to €5,070 EUR

A
Cheapest Retailer
-
€2,373 EUR
A
Retailer 2
-
€2,384 EUR
View
B+
Retailer 3
-
€2,699 EUR
View
B+
Retailer 4
-
€2,721 EUR
View
B+
Retailer 5
-
€2,805 EUR
View
Final sale: no returns
B+
Retailer 6
-
€2,933 EUR
View
B+
Retailer 7
-
€2,945 EUR
View
B+
Retailer 8
-
€2,949 EUR
View
Retailer 9
-
€3,040 EUR
View
Price last confirmed 8 days ago
B+
Retailer 10
-
€3,054 EUR
View
B+
Retailer 11
-
€3,147 EUR
View
B+
Retailer 12
-
€3,169 EUR
View
B+
Retailer 13
-
€3,226 EUR
View
Retailer 14
-
€3,247 EUR
View
Price last confirmed 30 days ago
B+
Retailer 15
-
€3,311 EUR
View
B+
Retailer 16
-
€3,539 EUR
View
B
Retailer 17
-
€3,710 EUR
View
B
Retailer 18
-
€4,481 EUR
View
B
Retailer 19
-
€4,605 EUR
View
Most Expensive
B
MOH London
52F0D1674 · Nov 4
€5,070 EUR
£4,457 GBP
View
19 more retailers have this diamond
Prices start from €2,373 EURSave up to €2,697 EUR

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
€2,373 EUR