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

Hematite
Oxide specular on quartz
iron oxide
Fe2 O3
Scale bar = 1 centimetre
cleavage: None
crystal system: Trigonal
hardness:  5.0 - 6.0
relative density:  5.2 - 5.3
Cleator Moor, Cumberland
26 B 8