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Heart|Natural|GIA

1.21ct F SI1 Heart Natural Diamond

F/SI1 • GIA 2566019280

Certificate GIA 2566019280

Diamond specifications and retailer prices

From £2,121 GBP
As of November 6, 2026
Save £2,450 GBP (54%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £4,571 GBP at NZ Jewellers · As of November 5, 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 F colour (colourless) and SI1 clarity (slightly-included) and certified by GIA 2566019280. Listed at 5 retailers as of November 5, 2026, with prices from £2,121 to £4,571, a £2,450 spread on the same certified stone. NZ Jewellers lists it at £4,571. 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
F
Colour
SI1
Clarity
-
Cut

Specifications

Cut
PolishExcellent
SymmetryVery Good
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 2566019280
Dimensions6.99 × 7.09 × 4.11 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Twinning Wisp, Crystal, Feather, Needle
Top View
6.99 mm7.09 mm1.21 ctF / SI1
OriginNatural
PolishExcellent
SymmetryVery Good
FluorescenceStrong
CertificateGIA 2566019280
Side View
Table 58.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 58.0%

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: £4,571 GBP|Low: £2,120 GBP|High: £4,571 GBP|Avg: £3,006 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 2£2,121 GBP
Retailer 5£2,187 GBP
Retailer 4£2,270 GBP
Retailer 3£3,646 GBP
NZ Jewellers£4,571 GBP

16 data points across 5 retailers

5 retailers£2,121 GBP to £4,571 GBP

B+
Cheapest Retailer
-
£2,121 GBP
B
Retailer 2
-
£2,187 GBP
View
B
Retailer 3
-
£2,270 GBP
View
B
Retailer 4
-
£3,646 GBP
View
Most Expensive
C
NZ Jewellers
5ffd7e0a-1695-455b-9853-ef5c2183389e · Nov 5
£4,571 GBP
$6,118 USD
View
4 more retailers have this diamond
Prices start from £2,121 GBPSave up to £2,450 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.

B+
1.21ct Heart
£2,121 GBP