Cleaning Vryvynenite

Can any one help me for cleaning Vryvynenite crystals they have black
Color substance sticken on the crystals

Do you mean Väyrynenite?

Probably manganese. Goodluck with cleaning that off ;)

It is vayvynite

Here are they images ...How to clean them?
Thanks
Ghazanfar

"It is vayvynite", no such species! Translation problem maybe?

Looks like the mineral is actually "väyrynenite", as Peter suggested, with an Mn-oxide coat.

Best bet would be Waller's solution (sodium citrate + sodium bicarbonate + sodium dithionite/"hydrosulfite"), which is near-neutral or mildly alkaline pH and very effectively reduces insoluble Fe³⁺ and Mn⁴⁺ to soluble cations, which are kept in solution by the citrate. Somewhat sulfur-smelly but not very corrosive to silicates, phosphates, etc.

See [homepage.mac.com]

Ghazanfar,

I really should have said Manganese Oxide instead of just Manganese, it's just that the keys on these iphones aren't made for big fingers and try to get out of if as much as I can

Goodluck with the cleaning my friend.