He wants to find a rare blue diamond that's only found at the volcanic site and will help expand his communication technologies.

For this, she requires very rare black diamonds, which are to be found on the jungle island where the Kikurians live.

"And what could possibly be more fantastic than a lost isle and a rare red diamond?"

A rare black diamond one hundred feet across and maybe fifty feet deep?

The case, it seems, has something to do with a cache of rare pink diamonds.

They are like rare little diamonds on a sandy beach.

Moto enters and tries to sell a rare diamond to the owner.

The Argyle diamond mine is the main source of rare pink diamonds.

In turn, he will give Jones a rare diamond.

A security agency becomes involved in a violent conflict over possession of a rare diamond.