Podcast:Moment Of Um Published On: Wed Jun 05 2024 Description: Lots of people love sparkly, pretty things – especially precious stones, like diamonds. But who decides which stones are precious? And what makes diamonds so special? We asked geologist Marc M. Hirschmann to help us find the answer.Got a priceless question? Send it to us at BrainsOn.org/contact, and we’ll help find a jewel of an answer!See omnystudio.com/listener for privacy information.