If something valuable is found in an animal’s stomach, should we pay zakaah on it if there is no intention of selling it?

Praise be to Allaah. 

We put this question to Shaykh Muhammad
ibn Saalih al-‘Uthaymeen, may Allaah preserve him, who answered as follows:

 If
it is not gold or silver, there is no zakaah to be paid on it. And Allaah
knows best.