gem

noun
  1. A precious or semi-precious stone, especially when cut and polished or engraved. noun
    The necklace was adorned with a sparkling gem.
    She wore a ring set with a large, brilliant gem.
  2. A person or thing considered to be outstandingly good or special in some respect. noun
    The book is a gem of modern literature.
    He is a real gem, always willing to help others.
  3. A small, sweet cake or biscuit. noun
    For dessert, we had tea and gems.
    The bakery is famous for its delicious little gems.