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Marquise|Natural|GIA

1.20ct F SI2 Marquise Natural Diamond

VG • F/SI2 • GIA 3555615862

Certificate GIA 3555615862

Diamond specifications and retailer prices

From £2,072 GBP
As of November 4, 2026
Save £1,871 GBP (47%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £3,943 GBP at Helzberg Diamonds · As of November 6, 2026
View at Helzberg Diamonds

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 very-good cut grade stated by the retailer rather than the lab and certified by GIA 3555615862. Listed at 12 retailers as of November 4, 2026, with prices from £2,072 to £3,943, a £1,871 spread on the same certified stone. Helzberg Diamonds lists it at £3,943. 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
SI2
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle39.74°
Pavilion angle39.75°
OriginNatural
Grading LabGIA
CertificateGIA 3555615862
Dimensions10.22 × 5.50 × 3.54 mm
L/W Ratio1.86
Culet sizeNone
Top View
10.22 mm5.50 mm1.20 ctF / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 3555615862
Side View
Table 58.0%Crown 39.74°Girdle: THN-VTKPavilion 39.75°Culet: NoneDepth 64.3%

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 4
Current: £3,943 GBP|Low: £2,072 GBP|High: £4,231 GBP|Avg: £2,785 GBP|-6.8%
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 6£2,072 GBP
Retailer 5£2,123 GBP
Retailer 7£2,235 GBP
Retailer 3£2,370 GBP
Retailer 4£2,420 GBP
Retailer 10£2,497 GBP
Retailer 8£2,665 GBP
Retailer 9£2,728 GBP
Retailer 2£2,756 GBP
Retailer 11£3,732 GBP
Helzberg Diamonds£3,943 GBP

39 data points across 11 retailers

12 retailers£2,072 GBP to £3,943 GBP

A
Cheapest Retailer
-
£2,072 GBP
A
Retailer 2
-
£2,123 GBP
View
A
Retailer 3
-
£2,235 GBP
View
A
Retailer 4
-
£2,370 GBP
View
A
Retailer 5
-
£2,420 GBP
View
A
Retailer 6
-
£2,497 GBP
View
B+
Retailer 7
-
£2,665 GBP
View
B+
Retailer 8
-
£2,728 GBP
View
B+
Retailer 9
-
£2,756 GBP
View
B+
Retailer 10
-
£3,060 GBP
View
B
Retailer 11
-
£3,732 GBP
View
Most Expensive
B
Helzberg Diamonds
XZRJLLLMHLOMI · Nov 6
£3,943 GBP
$5,278 USD
View
11 more retailers have this diamond
Prices start from £2,072 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.

A
1.20ct Marquise
£2,072 GBP