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Heart|Natural|IGI

1.21ct I SI1 Heart Natural Diamond

VG • I/SI1 • IGI 788607601

Shape and cutting style on the report: Heart brilliant

Certificate IGI 788607601

Diamond specifications and retailer prices

From €1,603 EUR
$1,798 USD
As of October 31, 2026
Save €2,725 EUR (63%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: €4,328 EUR at NZ Jewellers · As of November 3, 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 788607601. Listed at 16 retailers as of October 31, 2026, with prices from €1,603 to €4,328, a €2,725 spread on the same certified stone. NZ Jewellers lists it at €4,328. 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
SymmetryExcellent
FluorescenceNone
Crown angle37.3°
Pavilion angle41.6°
OriginNatural
Grading LabIGI
CertificateIGI 788607601
Dimensions6.57 × 7.20 × 4.42 mm
L/W Ratio1.10
Girdle conditionFaceted
Culet sizePointed
Top View
6.57 mm7.20 mm1.21 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 788607601
Side View
Table 62.0%Crown 37.3°Girdle: MED-THKPavilion 41.6°Culet: NoneDepth 61.4%

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: Oct 31
Current: €4,328 EUR|Low: €1,603 EUR|High: €4,328 EUR|Avg: €2,249 EUR|+13.2%
NZ Jewellers
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
Retailer 15
Retailer 16
November 3, 2026
Retailer 16€1,603 EUR
Retailer 6€1,637 EUR
Retailer 14€1,654 EUR
Retailer 10€1,731 EUR
Retailer 15€1,766 EUR
Retailer 7€1,829 EUR
Retailer 8€1,829 EUR
Retailer 9€1,856 EUR
Retailer 3€1,863 EUR
Retailer 12€1,897 EUR
Retailer 2€1,963 EUR
Retailer 4€2,047 EUR
Retailer 5€2,181 EUR
Retailer 11€2,423 EUR
Retailer 13€3,108 EUR
NZ Jewellers€4,328 EUR

30 data points across 16 retailers

16 retailers€1,603 EUR to €4,328 EUR

A
Cheapest Retailer
-
€1,603 EUR
$1,798 USD
A
Retailer 2
-
€1,637 EUR
$1,836 USD
View
Final sale: no returns
A
Retailer 3
-
€1,654 EUR
$1,855 USD
View
A
Retailer 4
-
€1,731 EUR
£1,528 GBP
View
B+
Retailer 5
-
€1,766 EUR
$1,981 USD
View
B+
Retailer 6
-
€1,829 EUR
$2,051 USD
View
B+
Retailer 7
-
€1,829 EUR
$2,051 USD
View
B+
Retailer 8
-
€1,856 EUR
$2,082 USD
View
B+
Retailer 9
-
€1,863 EUR
$2,089 USD
View
B+
Retailer 10
-
€1,897 EUR
$2,128 USD
View
B+
Retailer 11
-
€1,963 EUR
£1,734 GBP
View
B+
Retailer 12
-
€2,047 EUR
$2,296 USD
View
B+
Retailer 13
-
€2,181 EUR
ZAR 39,515 ZAR
View
B+
Retailer 14
-
€2,423 EUR
View
B
Retailer 15
-
€3,108 EUR
£2,745 GBP
View
Most Expensive
C
NZ Jewellers
e7f57f2b-408c-44ac-805d-a1c3ad3009ff · Nov 3
€4,328 EUR
$4,854 USD
View
15 more retailers have this diamond
Prices start from €1,603 EURSave up to €2,725 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
€1,603 EUR