"Vapor-loving": elements that remain in the atmosphere or hydrosphere (e.g., H, N, Noble Gases).
"Sulfur-loving": elements that concentrate in sulfide minerals (e.g., Cu, Zn, Ag).
"Rock-loving": elements that concentrate in silicate minerals (e.g., Al, Mg, K).
"Iron-loving": elements that concentrate in metallic iron (e.g., Ni, Co, Au).
Elements not found naturally in the Earth's crust, produced via nuclear synthesis.
Goldschmidt classification of elements based on their preferred terrestrial host phases.