Heart|Natural|IGI

1.21ct I SI2 Heart Natural Diamond

VG • I/SI2 • IGI 803629066

Shape and cutting style on the report: Heart brilliant

Certificate IGI 803629066

Diamond specifications and retailer prices

From £1,196 GBP
As of November 6, 2026
Save £1,130 GBP (49%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £3,346 GBP at NZ Jewellers · As of September 30, 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 SI2 clarity (slightly-included), with a very-good cut grade and certified by IGI 803629066. Listed at 15 retailers as of November 4, 2026, with a 95% 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
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.8°
Pavilion angle41.2°
OriginNatural
Grading LabIGI
CertificateIGI 803629066
Dimensions6.62 × 7.35 × 4.40 mm
L/W Ratio1.11
Girdle conditionFaceted
Top View
6.62 mm7.35 mm1.21 ctI / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 803629066
Side View
Table 56.0%Crown 35.8°Girdle: MED-THKPavilion 41.2°Culet: NoneDepth 59.9%

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: £1,210 GBP|Low: £1,160 GBP|High: £2,433 GBP|Avg: £1,541 GBP|+4.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 2£1,196 GBP
Retailer 1£1,210 GBP
Retailer 6£1,345 GBP
Retailer 8£1,372 GBP
Retailer 7£1,395 GBP
Retailer 4£1,414 GBP
Retailer 9£1,632 GBP
Retailer 3£1,666 GBP
Retailer 5£2,327 GBP

25 data points across 9 retailers

15 retailers£1,196 GBP to £2,327 GBP

A
Cheapest Retailer
-
£1,196 GBP
A
Retailer 2
-
£1,210 GBP
View
Final sale: no returns
B+
Retailer 3
-
£1,345 GBP
View
Retailer 4
-
£1,372 GBP
View
Price last confirmed 54 days ago
Retailer 5
-
£1,372 GBP
View
Price last confirmed 37 days ago
Retailer 6
-
£1,372 GBP
View
Price last confirmed 22 days ago
B+
Retailer 7
-
£1,395 GBP
View
B+
Retailer 8
-
£1,414 GBP
View
Retailer 9
-
£1,435 GBP
View
Price last confirmed 37 days ago
Retailer 10
-
£1,583 GBP
View
Price last confirmed 62 days ago
Retailer 11
-
£1,583 GBP
View
Price last confirmed 39 days ago
Retailer 12
-
£1,583 GBP
View
Price last confirmed 53 days ago
B+
Retailer 13
-
£1,666 GBP
View
B
Retailer 14
-
£2,327 GBP
View
Most Expensive
NZ Jewellers
9c76d632-0bfd-48a8-bcfa-fa835756c98a · Sep 30
£3,346 GBP
$4,479 USD
View
Price last confirmed 37 days ago
14 more retailers have this diamond
Prices start from £1,196 GBPSave up to £1,130 GBP

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
£1,196 GBP