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

Bournonite
Sulphide wheel ore
copper lead antimony sulphide
Cu Pb Sb S2
Scale bar = 1 centimetre
cleavage: Imperfect
crystal system: Orthorhombic
hardness:  2.5 - 3.0
relative density:  5.7 - 5.9
Herodsfoot, near Liskeard, Cornwall, England
25 C 2