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

Kyanite
Silicate disthene
aluminosilicate
Al2 Si O5
Scale bar = 1 centimetre
cleavage: Perfect
crystal system: Triclinic
hardness:  5.5 - 7.0
relative density:  3.5 - 3.7
Carrowtrasna, Co. Donegal, Ireland
24 M 1