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

Bornite
Sulphide peacock ore
copper iron sulphide
Cu5 Fe S4
Scale bar = 1 centimetre
cleavage: Very poor
crystal system: Cubic
hardness:  3.0
relative density:  5.0 - 5.1
Redruth, Cornwall, England
25 B 3