Which material to use for a dice?

Hi, I want to create a 36 sided dice. Is full color sandstone strong enough for repeated use or should I go with a different material and compromise the color? Tell me what you think.

What use would a 36 faced dice be used for, is forefront on my mind?

2D6

Oh it's the way my teacher picks students to go to the board. Right niw he's improvising using two dice. I want to get him a 36 sided one for a chrismas oresent.there are 36 seats in the class btw.

Replying from my phone so please forgive the typos.

Colored sandstone might not bedurable enough if he actually used it too often. But as a keepsake fine.

Keith