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Cleaning Vryvynenite

GHAZANFAR KAZMI February 14, 2012 12:12AM
Can any one help me for cleaning Vryvynenite crystals they have black
Color substance sticken on the crystals
Peter Cristofono February 14, 2012 01:56AM
Do you mean Väyrynenite?
Craig Mercer February 14, 2012 02:11PM
Probably manganese. Goodluck with cleaning that off ;)
GHAZANFAR KAZMI February 14, 2012 08:12PM
It is vayvynite
GHAZANFAR KAZMI February 14, 2012 08:19PM
Here are they images ...How to clean them?
open | download - photo.JPG (28.8 KB)
open | download - photo(1).JPG (39.7 KB)
Reiner Mielke February 15, 2012 01:30AM
"It is vayvynite", no such species! Translation problem maybe?
Andrew G. Christy February 15, 2012 02:36AM
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.

Craig Mercer February 15, 2012 04:20AM

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.
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