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

Kaolin Clay
Silicate lithomarge
hydrous aluminosilicate
Al2 Si2 O5 (OH)4
Scale bar = 1 centimetre
cleavage: Perfect basal
crystal system: Triclinic
hardness:  2.0 - 2.5
relative density:  2.6 - 2.7
Restormel iron mine, Lostwithiel, Cornwall
25 L 9