FMF - Friends of Minerals Forum, discussion and message board

[Greg Lilly]

I recently obtained some crystals of Anhydrite from Naica Mexico which are in need of a good clean. They appear to have a good color and luster under the clay (?). I have tried one in an ultrasonic cleaner with little improvement, can I use super iron out in them?
Thanks
Greg

[alfredo]

Anhydrite (unless it's cracked) is pretty tough stuff, so you might try a high-pressure water gun.

[Greg Lilly]

Thanks Alfredo,
A vast improvement, I haven’t cleaned around the join of the 2 crystals too much for fear of blowing them apart,
Greg