The Collaborative International Dictionary of English v.0.48:

Arango \A*ran"go\ ([.a]*r[a^][ng]"g[-o]), n.; pl. Arangoes
   (-g[=o]z). [The native name.]
   A bead of rough carnelian. Arangoes were formerly imported
   from Bombay for use in the African slave trade. --McCulloch.
   [1913 Webster]