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Heart|Natural|IGI

1.21ct I SI1 Heart Natural Diamond

VG • I/SI1 • IGI 726507508

Shape and cutting style on the report: Heart brilliant

Certificate IGI 726507508

Diamond specifications and retailer prices

From €1,680 EUR
$1,877 USD
As of November 1, 2026
Save €2,207 EUR (57%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: €3,887 EUR at NZ Jewellers · As of September 20, 2026
View at NZ Jewellers

About this 1.21ct natural heart diamond

This 1.21ct natural heart sits in the classic one-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 726507508. Listed at 13 retailers as of October 30, 2026, with a 131% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.21
Carat
I
Color
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Crown angle38.6°
Pavilion angle38.7°
OriginNatural
Grading LabIGI
CertificateIGI 726507508
Dimensions6.46 × 7.29 × 4.28 mm
L/W Ratio1.13
Girdle conditionFaceted
Culet sizePointed
Top View
6.46 mm7.29 mm1.21 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateIGI 726507508
Side View
Table 58.0%Crown 38.6°Girdle: MED-STKPavilion 38.7°Culet: NoneDepth 58.7%

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 1
Current: €2,075 EUR|Low: €1,680 EUR|High: €3,297 EUR|Avg: €2,169 EUR|+4.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 2, 2026
Retailer 4€1,680 EUR
Retailer 6€1,808 EUR
Retailer 7€1,859 EUR
Retailer 5€1,884 EUR
Retailer 1€2,075 EUR
Retailer 2€2,285 EUR
Retailer 8€2,589 EUR
Retailer 3€3,275 EUR

41 data points across 8 retailers

13 retailers€1,680 EUR to €3,887 EUR

A
Cheapest Retailer
-
€1,680 EUR
$1,877 USD
Retailer 2
-
€1,859 EUR
$2,077 USD
View
Price last confirmed 41 days ago
B+
Retailer 3
-
€1,859 EUR
$2,077 USD
View
B+
Retailer 4
-
€1,859 EUR
$2,077 USD
View
B+
Retailer 5
-
€1,884 EUR
$2,105 USD
View
B+
Retailer 6
-
€1,945 EUR
$2,173 USD
View
B+
Retailer 7
-
€2,075 EUR
£1,825 GBP
View
Retailer 8
-
€2,146 EUR
$2,397 USD
View
Price last confirmed 39 days ago
B+
Retailer 9
-
€2,146 EUR
$2,397 USD
View
B+
Retailer 10
-
€2,285 EUR
ZAR 41,246 ZAR
View
B
Retailer 11
-
€3,275 EUR
£2,881 GBP
View
C
Retailer 12
-
€3,887 EUR
$4,343 USD
View
Most Expensive
NZ Jewellers
2a16426c-cd62-4a91-b4ed-b2e3d80f3e91 · Sep 20
€3,887 EUR
$4,343 USD
View
Price last confirmed 42 days ago
12 more retailers have this diamond
Prices start from €1,680 EURSave up to €2,207 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
€1,680 EUR