'Sunstone' definitions:

Definition of 'sunstone'

(from WordNet)
noun
A translucent quartz spangled with bits of mica or other minerals [syn: sunstone, aventurine]

Definition of 'Sunstone'

From: GCIDE
  • Sunstone \Sun"stone`\, n. (Med.) Aventurine feldspar. See under Aventurine. [1913 Webster]