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Marquise|Natural|GIA

1.20ct F SI1 Marquise Natural Diamond

VG • F/SI1 • GIA 2557770054

Certificate GIA 2557770054

Diamond specifications and retailer prices

From £3,620 GBP
As of November 4, 2026
Save £3,112 GBP (46%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £6,733 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 1.2ct natural marquise diamond

This 1.2ct natural marquise sits in the classic one-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 2557770054. Listed at 20 retailers as of November 4, 2026, with prices from £3,620 to £6,733, a £3,112 spread on the same certified stone. MOH London lists it at £6,733. 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
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle41.01°
Pavilion angle40.15°
OriginNatural
Grading LabGIA
CertificateGIA 2557770054
Dimensions10.07 × 5.44 × 3.55 mm
L/W Ratio1.85
Culet sizeNone
Top View
10.07 mm5.44 mm1.20 ctF / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2557770054
Side View
Table 59.0%Crown 41.01°Girdle: STK-VTKPavilion 40.15°Culet: NoneDepth 65.2%

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 4
Current: £6,733 GBP|Low: £3,307 GBP|High: £6,833 GBP|Avg: £4,568 GBP|-1.5%
MOH London
Retailer 2
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Retailer 24
November 6, 2026
Retailer 16£3,307 GBP
Retailer 14£3,514 GBP
Retailer 9£3,620 GBP
Retailer 10£3,885 GBP
Retailer 7£4,102 GBP
Retailer 3£4,135 GBP
Retailer 23£4,327 GBP
Retailer 20£4,353 GBP
Retailer 4£4,362 GBP
Retailer 13£4,445 GBP
Retailer 12£4,468 GBP
Retailer 2£4,524 GBP
Retailer 8£4,553 GBP
Retailer 6£4,640 GBP
Retailer 24£4,640 GBP
Retailer 5£4,789 GBP
Retailer 22£4,790 GBP
Retailer 18£4,847 GBP
Retailer 19£4,979 GBP
Retailer 11£5,053 GBP
Retailer 17£5,431 GBP
Retailer 21£5,591 GBP
Retailer 15£5,742 GBP
MOH London£6,733 GBP

20 data points across 24 retailers

20 retailers£3,620 GBP to £6,733 GBP

B+
Cheapest Retailer
-
£3,620 GBP
B
Retailer 2
-
£3,885 GBP
View
B
Retailer 3
-
£4,102 GBP
View
B
Retailer 4
-
£4,135 GBP
View
Retailer 5
-
£4,151 GBP
View
Price last confirmed 30 days ago
B
Retailer 6
-
£4,327 GBP
View
B
Retailer 7
-
£4,353 GBP
View
B
Retailer 8
-
£4,362 GBP
View
B
Retailer 9
-
£4,445 GBP
View
Retailer 10
-
£4,524 GBP
View
Retailer 11
-
£4,553 GBP
View
Price last confirmed 34 days ago
B
Retailer 12
-
£4,640 GBP
View
B
Retailer 13
-
£4,640 GBP
View
B
Retailer 14
-
£4,789 GBP
View
B
Retailer 15
-
£4,790 GBP
View
B
Retailer 16
-
£4,847 GBP
View
B
Retailer 17
-
£4,979 GBP
View
Retailer 18
-
£5,053 GBP
View
Price last confirmed 29 days ago
B
Retailer 19
-
£5,591 GBP
View
Most Expensive
B
MOH London
3DCC2BDE9 · Nov 4
£6,733 GBP
View
19 more retailers have this diamond
Prices start from £3,620 GBPSave up to £3,112 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 Marquise
£3,620 GBP