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Heart|Natural|GIA

1.21ct D SI1 Heart Natural Diamond

EX • D/SI1 • GIA 2145498543

Certificate GIA 2145498543

Diamond specifications and retailer prices

From €3,590 EUR
As of November 6, 2026
Save €3,632 EUR (50%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: €7,222 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 2145498543. Listed at 13 retailers as of November 4, 2026, with prices from €3,590 to €7,222, a €3,632 spread on the same certified stone. MOH London lists it at €7,222. 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
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2145498543
Dimensions6.59 × 5.54 × 3.75 mm
L/W Ratio1.19
Culet sizeNone
Top View
6.59 mm5.54 mm1.21 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryGood
FluorescenceNone
CertificateGIA 2145498543
Side View
Table 68.0%CrownGirdle: THN-THKPavilionCulet: NoneDepth 67.6%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: €7,222 EUR|Low: €3,502 EUR|High: €7,677 EUR|Avg: €4,699 EUR|-1.3%
MOH London
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
November 6, 2026
Retailer 5€3,590 EUR
Retailer 14€3,592 EUR
Retailer 3€3,619 EUR
Retailer 10€3,668 EUR
Retailer 9€3,892 EUR
Retailer 12€4,119 EUR
Retailer 7€4,477 EUR
Retailer 6€4,686 EUR
Retailer 11€4,705 EUR
Retailer 4€5,019 EUR
Retailer 2€5,114 EUR
Retailer 8€5,547 EUR
Retailer 13€6,580 EUR
MOH London€7,222 EUR

27 data points across 14 retailers

13 retailers€3,590 EUR to €7,222 EUR

B+
Cheapest Retailer
-
€3,590 EUR
B+
Retailer 2
-
€3,592 EUR
View
B+
Retailer 3
-
€3,619 EUR
View
Final sale: no returns
Retailer 4
-
€3,668 EUR
View
Price last confirmed 9 days ago
B
Retailer 5
-
€3,892 EUR
View
Retailer 6
-
€4,119 EUR
View
Price last confirmed 8 days ago
B
Retailer 7
-
€4,477 EUR
View
B
Retailer 8
-
€4,705 EUR
View
Retailer 9
-
€5,019 EUR
View
Price last confirmed 14 days ago
B
Retailer 10
-
€5,114 EUR
View
B
Retailer 11
-
€5,547 EUR
View
B
Retailer 12
-
€6,580 EUR
View
Most Expensive
B
MOH London
D254C7E99 · Nov 4
€7,222 EUR
£6,349 GBP
View
12 more retailers have this diamond
Prices start from €3,590 EURSave up to €3,632 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.

B+
1.21ct Heart
€3,590 EUR