pinite: grey or green or brown mineral similar to mica and containing aluminum and potassium sulphates
mineral: solid homogeneous inorganic substances occurring in nature having a definite chemical composition
tree fern: any of numerous usually tropical ferns having a thick woody stem or caudex and a crown of large fronds; found especially in Australia and New Zealand; chiefly of the families Cyatheaceae and Marattiaceae but some from Polypodiaceae