a necklace made of coral的用法和样例：
- A necklace made of such pieces.
- Is this necklace made of natural pearls?
- He gave me a necklace as a token of his affection..
- She wore a necklace of hyacinth.
- A collar, a necklace, or an armband made of a strip of twisted metal, worn by the ancient Gauls, Germans, and Britons.