Acer palmatum, although there are more than 100 species of maple worldwide, only one species (Acer campestre) is native to the UK.

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Earth lab datasite

Hemimorphite
Silicate calamine
hydrous zinc silicate
Zn4 Si2 O7 OH2 ?
Scale bar = 1 centimetre
cleavage: Perfect
crystal system: Orthorhombic
hardness:  4.5 - 5.0
relative density:  3.4 - 3.5
Roughton Gill, Caldbeck Fells, Cumberland
26 F 6