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Techniques for CollectorsCleaning Vryvynenite

14th Feb 2012 00:12 UTCGHAZANFAR KAZMI

Can any one help me for cleaning Vryvynenite crystals they have black

Color substance sticken on the crystals

14th Feb 2012 01:56 UTCPeter Cristofono

Do you mean Väyrynenite?

14th Feb 2012 14:11 UTCCraig Mercer

Probably manganese. Goodluck with cleaning that off ;)

14th Feb 2012 20:12 UTCGHAZANFAR KAZMI

It is vayvynite

14th Feb 2012 20:19 UTCGHAZANFAR KAZMI

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

Thanks

Ghazanfar

15th Feb 2012 01:30 UTCReiner Mielke Expert

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

15th Feb 2012 02:36 UTCAndrew G. Christy Manager

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 http://homepage.mac.com/rasprague/PegShop/extras/waller/waller1.html

15th Feb 2012 04:20 UTCCraig Mercer

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.
 
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