What's the Book of Zephaniah All About?
Who Wrote the Book of Jonah and What's its Purpose?
What Does "the Dragon" in Revelation 12 Represent?
kost'-li-nes (timiotes, "preciousness," "an abundance of costly things"):
Found only in Revelation 18:19, "made rich by reason of her costliness."
Orr, James, M.A., D.D. General Editor. "Entry for 'COSTLINESS'". "International Standard Bible Encyclopedia". 1915.