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

Strontianite
Carbonate strontium ore
strontium carbonate
Sr CO3
Scale bar = 1 centimetre
cleavage: Perfect prismatic
crystal system: Orthorhombic
hardness:  3.5
relative density:  3.8
Strontian, Argyllshire
24 B 4