Composition: Cerium lanthanum thorium neodymium yttrium phosphate
Nomenclature: Named from the Greek word "monazeis," which means "to be alone" in reference to its isolated crystals.
Industrial Uses: Ore of cerium, thorium, and lanthanum.
Additional Notes: Monazite is radioactive and has been used in radioactive dating techniques. Monazite is a relatively hard, dense mineral which survives weathering. As a result, monazite grains are a frequent constituent of beach sands.
Uganda : Scott 605 : 100 shilling : 18 Jan 1988