How do you say something rare or unusual?

There are many ways to say something is rare or unusual, depending on the context and the desired level of formality. Here are some options:

Formal:

* Rare: uncommon, infrequent, infrequent, scarce, exceptional, extraordinary, singular

* Unusual: atypical, aberrant, anomalous, peculiar, distinctive, remarkable, singular

Informal:

* Rare: hard to find, one-of-a-kind, unique

* Unusual: strange, odd, weird, quirky, out of the ordinary, different, peculiar

Other options:

* Unprecedented: never happened before

* Unparalleled: without equal

* Remarkable: worthy of attention or notice

* Exceptional: outstanding, extraordinary

* Unique: one of a kind, special

Examples:

* "The antique vase is a rare find."

* "Her singing voice is unusual and beautiful."

* "The team's performance was unprecedented."

* "The painting is unique and valuable."

* "He had a peculiar habit of collecting buttons."

The best way to choose the right word depends on the specific situation. Consider the context and the level of formality to choose the most appropriate term.