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Marquise|Natural|GIA

1.20ct F SI2 Marquise Natural Diamond

EX • F/SI2 • GIA 6545918778

Certificate GIA 6545918778

Diamond specifications and retailer prices

From £2,682 GBP
As of November 5, 2026
Save £3,077 GBP (53%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £5,759 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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6545918778. Listed at 20 retailers as of November 4, 2026, with prices from £2,682 to £5,759, a £3,077 spread on the same certified stone. MOH London lists it at £5,759. 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
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6545918778
Dimensions10.36 × 5.54 × 3.53 mm
L/W Ratio1.87
Top View
10.36 mm5.54 mm1.20 ctF / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6545918778
Side View
Table 63.0%CrownGirdle: THK-XTKPavilionCulet: NoneDepth 63.8%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £5,759 GBP|Low: £2,682 GBP|High: £6,142 GBP|Avg: £3,678 GBP|-5.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
November 6, 2026
Retailer 16£2,682 GBP
Retailer 6£2,833 GBP
Retailer 2£2,861 GBP
Retailer 4£2,890 GBP
Retailer 7£2,897 GBP
Retailer 13£2,998 GBP
Retailer 5£3,031 GBP
Retailer 11£3,053 GBP
Retailer 3£3,266 GBP
Retailer 17£3,339 GBP
Retailer 9£3,447 GBP
Retailer 15£3,549 GBP
Retailer 12£3,565 GBP
Retailer 8£3,698 GBP
Retailer 18£3,698 GBP
Retailer 19£3,818 GBP
Retailer 14£3,850 GBP
Retailer 10£5,246 GBP
MOH London£5,759 GBP

24 data points across 19 retailers

20 retailers£2,682 GBP to £5,759 GBP

A
Cheapest Retailer
-
£2,682 GBP
B+
Retailer 2
-
£2,787 GBP
View
B+
Retailer 3
-
£2,833 GBP
View
B+
Retailer 4
-
£2,861 GBP
View
B+
Retailer 5
-
£2,890 GBP
View
B+
Retailer 6
-
£2,897 GBP
View
B+
Retailer 7
-
£2,997 GBP
View
B+
Retailer 8
-
£2,998 GBP
View
B+
Retailer 9
-
£3,031 GBP
View
Final sale: no returns
B+
Retailer 10
-
£3,266 GBP
View
B+
Retailer 11
-
£3,339 GBP
View
B
Retailer 12
-
£3,447 GBP
View
B+
Retailer 13
-
£3,549 GBP
View
B+
Retailer 14
-
£3,565 GBP
View
B+
Retailer 15
-
£3,698 GBP
View
B+
Retailer 16
-
£3,698 GBP
View
B
Retailer 17
-
£3,818 GBP
View
B+
Retailer 18
-
£3,850 GBP
View
B
Retailer 19
-
£5,246 GBP
View
Most Expensive
B
MOH London
DF1557164 · Nov 4
£5,759 GBP
View
19 more retailers have this diamond
Prices start from £2,682 GBPSave up to £3,077 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.

A
1.20ct Marquise
£2,682 GBP