mineral

One Pound Coin (UK)

Nickel-Brass Alloy (Cu-Zn-Ni)

Hardness: 3-4 Mohs; Color: Pale gold/yellow; Luster: Metallic; Structure: Cubic (metal lattice); Cleavage: None; Specific Gravity: Approx. 8.4-8.6

Hardness: 3-4 Mohs
Color: Pale gold/yellow
Luster: Metallic

Identified March 5, 2026More mineral →

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Physical properties

Hardness: 3-4 Mohs; Color: Pale gold/yellow; Luster: Metallic; Structure: Cubic (metal lattice); Cleavage: None; Specific Gravity: Approx. 8.4-8.6

Formation & geological history

Man-made industrial alloy; struck by the Royal Mint in 1991. Not a naturally occurring geological specimen.

Uses & applications

Currency/Legal tender in the United Kingdom (withdrawn from circulation in 2017).

Geological facts

This specific design features the portrait of Queen Elizabeth II. The 'round pound' was replaced in 2017 by a 12-sided bi-metallic coin to prevent counterfeiting.

Field identification & locations

Identified by the text 'ELIZABETH II', 'D.G.REG.F.D.', and the date '1991'. It is non-magnetic and features a milled edge with an incuse inscription.

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