Color sandstone

I was wanting to check 2 things
1. Can I use colored sandstone on moving parts and 2. if so how far apart does the sandstone have to be? (this will only be used for figurine movement and nothing heavy duty)

I believe i read it was .9mm. It should be listed on the material page.
bvr

I don't see it specifically

It's on the Design Rules Page:

Clearance: 0.9mm
min gap between close parts
ex: money clip; or gap between chain links

Tom.