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Techniques for CollectorsCleaning Vryvynenite
14th Feb 2012 00:12 UTCGHAZANFAR KAZMI
Color substance sticken on the crystals
14th Feb 2012 01:56 UTCPeter Cristofono
14th Feb 2012 14:11 UTCCraig Mercer
14th Feb 2012 20:12 UTCGHAZANFAR KAZMI
14th Feb 2012 20:19 UTCGHAZANFAR KAZMI
Thanks
Ghazanfar
15th Feb 2012 01:30 UTCReiner Mielke Expert
15th Feb 2012 02:36 UTCAndrew G. Christy Manager
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
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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