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

Smithsonite
Carbonate replacing calcite
zinc carbonate
Zn CO3
Scale bar = 1 centimetre
cleavage: Perfect rhombohedral
crystal system: Trigonal
hardness:  4.0 - 4.5
relative density:  4.3 - 4.5
Derbyshire
26 I 6