Another curling fan in #TeamRiebeckite :)

Riebeckite: curling stones and asbestos.

Gadolinite-(Y): rare earths and radiation. Also thermoluminescence.

Gadolinite seems to have a slight edge in Cool Stuff factors — but curling stones outweigh them. So I'm #TeamRiebeckite.

#MinCup #Mineralcup2026