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Heart|Natural|GIA

1.20ct F SI1 Heart Natural Diamond

EX • F/SI1 • GIA 5413323903

Certificate GIA 5413323903

Diamond specifications and retailer prices

From £2,726 GBP
As of November 5, 2026
Save £3,390 GBP (55%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £6,116 GBP at NZ Jewellers · As of November 5, 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 5413323903. Listed at 11 retailers as of November 5, 2026, with prices from £2,726 to £6,116, a £3,390 spread on the same certified stone. NZ Jewellers lists it at £6,116. 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
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 5413323903
Dimensions6.36 × 7.37 × 4.28 mm
L/W Ratio1.16
Top View
6.36 mm7.37 mm1.20 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 5413323903
Side View
Table 59.0%CrownGirdle: STK-THKPavilionCulet: 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 5
Current: £6,116 GBP|Low: £2,622 GBP|High: £6,116 GBP|Avg: £3,770 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 3£2,726 GBP
Retailer 7£2,776 GBP
Retailer 5£2,935 GBP
Retailer 6£3,180 GBP
Retailer 8£3,180 GBP
Retailer 2£3,490 GBP
Retailer 9£3,669 GBP
Retailer 10£3,882 GBP
Retailer 4£5,576 GBP
NZ Jewellers£6,116 GBP

38 data points across 10 retailers

11 retailers£2,726 GBP to £6,116 GBP

B+
Cheapest Retailer
-
£2,726 GBP
B+
Retailer 2
-
£2,776 GBP
View
B
Retailer 3
-
£2,826 GBP
View
B
Retailer 4
-
£2,919 GBP
View
B
Retailer 5
-
£2,935 GBP
View
Final sale: no returns
B
Retailer 6
-
£3,180 GBP
View
B
Retailer 7
-
£3,180 GBP
View
B
Retailer 8
-
£3,490 GBP
View
B
Retailer 9
-
£3,669 GBP
View
B
Retailer 10
-
£5,576 GBP
View
Most Expensive
B
NZ Jewellers
f98dea9f-60bb-4ddc-afc2-d8ee93f13844 · Nov 5
£6,116 GBP
$8,186 USD
View
10 more retailers have this diamond
Prices start from £2,726 GBPSave up to £3,390 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
£2,726 GBP