title: Zirconolite
text: # Zirconolite
  
  Zirconolite is a mineral, calcium zirconium titanate; formula $CaZrTi_2O_7.$ Some examples of the mineral may also contain thorium, uranium, cerium, niobium and iron; the presence of thorium or uranium would make the mineral radioactive. It is black or brown in color.
  
  