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Marquise|Natural|GIA

1.20ct H SI1 Marquise Natural Diamond

GD • H/SI1 • GIA 1559555055

Certificate GIA 1559555055

Diamond specifications and retailer prices

From £1,795 GBP
As of November 5, 2026
Save £1,791 GBP (50%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £3,586 GBP at Wholesale Diamonds Direct · As of November 6, 2026
View at Wholesale Diamonds Direct

About this 1.2ct natural marquise diamond

This 1.2ct natural marquise sits in the classic one-carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 1559555055. Listed at 11 retailers as of November 5, 2026, with prices from £1,795 to £3,586, a £1,791 spread on the same certified stone. Wholesale Diamonds Direct lists it at £3,586. 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
H
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.93°
Pavilion angle41.62°
OriginNatural
Grading LabGIA
CertificateGIA 1559555055
Dimensions9.84 × 5.39 × 3.65 mm
L/W Ratio1.83
Culet sizeNone
Top View
9.84 mm5.39 mm1.20 ctH / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1559555055
Side View
Table 61.0%Crown 43.93°Girdle: THN-VTKPavilion 41.62°Culet: NoneDepth 67.7%

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: £2,141 GBP|Low: £1,785 GBP|High: £4,030 GBP|Avg: £2,709 GBP|-11.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Wholesale Diamonds Direct
November 6, 2026
Retailer 3£1,795 GBP
Retailer 4£1,986 GBP
Retailer 1£2,141 GBP
Retailer 8£2,392 GBP
Retailer 6£2,560 GBP
Retailer 9£2,591 GBP
Retailer 7£2,628 GBP
Retailer 2£2,641 GBP
Retailer 5£3,350 GBP
Wholesale Diamonds Direct£3,586 GBP

33 data points across 10 retailers

11 retailers£1,795 GBP to £3,586 GBP

A
Cheapest Retailer
-
£1,795 GBP
A
Retailer 2
-
£1,986 GBP
View
B+
Retailer 3
-
£2,141 GBP
View
B+
Retailer 4
-
£2,392 GBP
View
B+
Retailer 5
-
£2,560 GBP
View
B+
Retailer 6
-
£2,591 GBP
View
B+
Retailer 7
-
£2,628 GBP
View
B+
Retailer 8
-
£2,641 GBP
View
B
Retailer 9
-
£3,053 GBP
View
B
Retailer 10
-
£3,350 GBP
View
Most Expensive
B
Wholesale Diamonds Direct
643535015 · Nov 6
£3,586 GBP
$4,800 USD
View
10 more retailers have this diamond
Prices start from £1,795 GBPSave up to £1,791 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
£1,795 GBP