Medusa are you NH3?
It kind of looks that way to me.
Faceted then turns to dust.
No longer in our gas we trust.
Isobutane or benzene?
some suspect it’s propylene.
A water wash, and 13x
No longer does the problem vex
So what causes chalking stones?
Do we have but more unknowns?
No, I think we’ve found it now
And this picture tells me how
@Photon_noir & @Roguelab have both shown
Crystals in ammonia grown.