So the reason crystals ending in “-ite” usually can’t get wet is because they’re low on the Mohs Hardness Scale. The crystals can dissolve if left in water, or they can rub off like wet chalk.
@Francisco did an experiment with selenite and water last year (I think?) that shows it doesn’t happen too quickly.
→ Does Selenite Dissolve in Water? My Experiment: 1 Hour/Day/Week
I don’t think a little bit of liquid will hurt it but over time, since those particular crystals aren’t very hard, I would be very cautious.