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Heart|Natural|GIA

1.21ct F SI2 Heart Natural Diamond

EX • F/SI2 • GIA 6545247511

Certificate GIA 6545247511

Diamond specifications and retailer prices

From £1,296 GBP
As of November 6, 2026
Save £1,745 GBP (57%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £3,745 GBP at NZ Jewellers · As of September 25, 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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6545247511. Listed at 13 retailers as of November 4, 2026, with a 135% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
F
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6545247511
Dimensions6.59 × 7.23 × 4.29 mm
L/W Ratio1.10
Top View
6.59 mm7.23 mm1.21 ctF / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6545247511
Side View
Table 60.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 59.4%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £1,296 GBP|Low: £1,296 GBP|High: £3,090 GBP|Avg: £1,851 GBP|-3.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 1£1,296 GBP
Retailer 9£1,377 GBP
Retailer 10£1,572 GBP
Retailer 8£1,711 GBP
Retailer 2£1,817 GBP
Retailer 6£1,845 GBP
Retailer 4£1,892 GBP
Retailer 7£1,995 GBP
Retailer 3£2,030 GBP
Retailer 5£3,041 GBP

37 data points across 10 retailers

13 retailers£1,296 GBP to £3,041 GBP

A
Cheapest Retailer
-
£1,296 GBP
A
Retailer 2
-
£1,377 GBP
View
Final sale: no returns
A
Retailer 3
-
£1,572 GBP
View
B+
Retailer 4
-
£1,711 GBP
View
Retailer 5
-
£1,791 GBP
View
Price last confirmed 43 days ago
B+
Retailer 6
-
£1,817 GBP
View
B+
Retailer 7
-
£1,845 GBP
View
B+
Retailer 8
-
£1,892 GBP
View
B+
Retailer 9
-
£1,995 GBP
View
B+
Retailer 10
-
£2,030 GBP
View
Retailer 11
-
£2,067 GBP
View
Price last confirmed 44 days ago
B
Retailer 12
-
£3,041 GBP
View
Most Expensive
NZ Jewellers
e43a100d-f2ba-4ee1-a407-1e5eace99caa · Sep 25
£3,745 GBP
$5,012 USD
View
Price last confirmed 42 days ago
12 more retailers have this diamond
Prices start from £1,296 GBPSave up to £1,745 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
£1,296 GBP