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Heart|Natural|GIA

1.21ct F SI1 Heart Natural Diamond

EX • F/SI1 • GIA 1418156170

Certificate GIA 1418156170

Diamond specifications and retailer prices

From £2,164 GBP
As of November 6, 2026
Save £4,262 GBP (66%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £6,426 GBP at Yorxs · As of November 6, 2026
View at Yorxs

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), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1418156170. Listed at 8 retailers as of November 6, 2026, with prices from £2,164 to £6,426, a £4,262 spread on the same certified stone. Yorxs lists it at £6,426. 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
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1418156170
Dimensions7.26 × 7.37 × 4.00 mm
L/W Ratio1.02
Culet sizeNone
Key to symbols
Twinning Wisp, Feather, Crystal, Needle
Top View
7.26 mm7.37 mm1.21 ctF / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 1418156170
Side View
Table 63.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 54.3%

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: £3,439 GBP|Low: £2,164 GBP|High: £6,477 GBP|Avg: £4,408 GBP|-37.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Yorxs
November 6, 2026
Retailer 4£2,164 GBP
Retailer 3£2,300 GBP
Retailer 6£2,327 GBP
Retailer 5£2,407 GBP
Retailer 7£2,929 GBP
Retailer 1£3,439 GBP
Retailer 2£3,694 GBP
Yorxs£6,426 GBP

44 data points across 8 retailers

8 retailers£2,164 GBP to £6,426 GBP

B+
Cheapest Retailer
-
£2,164 GBP
B+
Retailer 2
-
£2,300 GBP
View
B+
Retailer 3
-
£2,327 GBP
View
B+
Retailer 4
-
£2,407 GBP
View
Final sale: no returns
B
Retailer 5
-
£2,929 GBP
View
B
Retailer 6
-
£3,439 GBP
View
B
Retailer 7
-
£3,694 GBP
View
Most Expensive
B
Yorxs
217813255 · Nov 6
£6,426 GBP
€8,191 EUR
View
7 more retailers have this diamond
Prices start from £2,164 GBPSave up to £4,262 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
£2,164 GBP