Dendrite (metal)

A silver crystal, electrolytically refined with visible dendritic structures
A pure copper crystal with dendritic structure, electrolytic made.
Dendritic crystallization after melting inside sealed ampules of rubidium and caesium metal

A dendrite in metallurgy is a characteristic tree-like structure of crystals growing as molten metal solidifies, the shape produced by faster growth along energetically favourable crystallographic directions. This dendritic growth has large consequences in regard to material properties.