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Heart|Natural|GIA

1.20ct F SI1 Heart Natural Diamond

GD • F/SI1 • GIA 6431067710

Shape and cutting style on the report: Cushion modified brilliant

Certificate GIA 6431067710

Diamond specifications and retailer prices

From £1,387 GBP
As of November 6, 2026
Save £1,871 GBP (57%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £3,257 GBP at MOH London · As of November 4, 2026
View at MOH London

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 standard cut grade stated by the retailer rather than the lab and certified by GIA 6431067710. Listed at 15 retailers as of November 4, 2026, with prices from £1,387 to £3,257, a £1,871 spread on the same certified stone. MOH London lists it at £3,257. 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

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

Specifications

Cut (retailer stated)Good
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6431067710
Dimensions6.62 × 5.39 × 4.00 mm
L/W Ratio1.23
Top View
6.62 mm5.39 mm1.20 ctF / SI1
OriginNatural
CutGood
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6431067710
Side View
Table 61.0%CrownGirdle: MED-ETKPavilionCulet: NoneDepth 74.2%

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: £3,257 GBP|Low: £1,377 GBP|High: £3,306 GBP|Avg: £2,036 GBP|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 7£1,387 GBP
Retailer 8£1,684 GBP
Retailer 10£1,685 GBP
Retailer 9£1,721 GBP
Retailer 3£1,864 GBP
Retailer 5£1,972 GBP
Retailer 6£2,006 GBP
Retailer 11£2,096 GBP
Retailer 4£2,275 GBP
Retailer 2£2,315 GBP
MOH London£3,257 GBP

46 data points across 11 retailers

15 retailers£1,387 GBP to £3,257 GBP

B+
Cheapest Retailer
-
£1,387 GBP
B+
Retailer 2
-
£1,684 GBP
View
B+
Retailer 3
-
£1,685 GBP
View
B+
Retailer 4
-
£1,721 GBP
View
Final sale: no returns
B+
Retailer 5
-
£1,820 GBP
View
Retailer 6
-
£1,864 GBP
View
Price last confirmed 8 days ago
Retailer 7
-
£1,929 GBP
View
Price last confirmed 10 days ago
B
Retailer 8
-
£1,962 GBP
View
B
Retailer 9
-
£1,969 GBP
View
B+
Retailer 10
-
£1,972 GBP
View
B
Retailer 11
-
£2,006 GBP
View
Retailer 12
-
£2,096 GBP
View
Price last confirmed 33 days ago
B
Retailer 13
-
£2,275 GBP
View
B
Retailer 14
-
£2,315 GBP
View
Most Expensive
B
MOH London
EF17A3B57 · Nov 4
£3,257 GBP
View
14 more retailers have this diamond
Prices start from £1,387 GBPSave up to £1,871 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
£1,387 GBP