Heart|Natural|GIA

1.20ct F SI1 Heart Natural Diamond

ID • F/SI1 • GIA 25

Certificate GIA 25

Diamond specifications and retailer prices

From £2,474 GBP
As of November 6, 2026
Save £947 GBP (28%) vs most expensive(unlock to see where)
29 retailers carry this diamond
Most expensive: £5,703 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.2ct natural heart diamond

This 1.2ct 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. Listed at 29 retailers as of November 5, 2026, with a 38% 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

1.20
Carat
F
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 25
Dimensions6.41 × 7.56 × 4.14 mm
L/W Ratio1.18
Top View
6.41 mm7.56 mm1.20 ctF / SI1
OriginNatural
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 25
Side View
Table 62.0%CrownGirdle: MED-ETKPavilionCulet: NoneDepth 54.8%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £5,703 GBP|Low: £2,474 GBP|High: £5,703 GBP|Avg: £3,275 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 7£2,474 GBP
Retailer 8£2,517 GBP
Retailer 4£2,965 GBP
Retailer 5£2,965 GBP
Retailer 6£2,965 GBP
Retailer 2£3,175 GBP
Retailer 3£3,422 GBP
NZ Jewellers£5,703 GBP

24 data points across 8 retailers

29 retailers£2,474 GBP to £3,422 GBP

B+
Cheapest Retailer
-
£2,474 GBP
B+
Retailer 2
-
£2,517 GBP
View
Retailer 3
-
£2,965 GBP
View
Price last confirmed 8 days ago
B
Retailer 4
-
£2,965 GBP
View
Retailer 5
-
£2,965 GBP
View
Price last confirmed 13 days ago
Retailer 6
-
£2,965 GBP
View
Price last confirmed 8 days ago
Retailer 7
-
£2,965 GBP
View
Price last confirmed 21 days ago
Retailer 8
-
£2,965 GBP
View
Price last confirmed 11 days ago
Retailer 9
-
£2,965 GBP
View
Price last confirmed 8 days ago
Retailer 10
-
£2,965 GBP
View
Price last confirmed 42 days ago
Retailer 11
-
£2,965 GBP
View
Price last confirmed 15 days ago
B
Retailer 12
-
£2,965 GBP
View
Retailer 13
-
£2,965 GBP
View
Price last confirmed 30 days ago
B
Retailer 14
-
£3,175 GBP
View
Retailer 15
-
£3,422 GBP
View
Price last confirmed 14 days ago
B
Retailer 16
-
£3,422 GBP
View
Retailer 17
-
£3,422 GBP
View
Price last confirmed 10 days ago
Retailer 18
-
£3,422 GBP
View
Price last confirmed 56 days ago
Retailer 19
-
£3,422 GBP
View
Price last confirmed 43 days ago
Retailer 20
-
£3,422 GBP
View
Price last confirmed 30 days ago
B
Retailer 21
-
£3,422 GBP
View
Retailer 22
-
£3,422 GBP
View
Price last confirmed 21 days ago
Retailer 23
-
£3,422 GBP
View
Price last confirmed 23 days ago
Retailer 24
-
£5,703 GBP
View
Price last confirmed 31 days ago
Retailer 25
-
£5,703 GBP
View
Price last confirmed 42 days ago
Retailer 26
-
£5,703 GBP
View
Price last confirmed 13 days ago
Retailer 27
-
£5,703 GBP
View
Price last confirmed 10 days ago
Retailer 28
-
£5,703 GBP
View
Price last confirmed 23 days ago
Most Expensive
NZ Jewellers
7a147ca9-5ff2-4c41-bc9c-94cc60f8a822 · Oct 30
£5,703 GBP
$7,633 USD
View
Price last confirmed 7 days ago
28 more retailers have this diamond
Prices start from £2,474 GBPSave up to £947 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+
1.20ct Heart
£2,474 GBP