Hiya Found this again in Oulujoki riverbed under the ice, was digging ice! Finland. It absolutly stinks of Arsenic! The black stuff on top cannot be marked with a penknife only a pegmatite leaves a scratch and there is a streak of grey/black to it. The rest of the rock leaves a streak of black also and is much softer - easy to scratch with penknife! I have not as yet tried to hit it to see if garlic is realesed. It is also heavy. Some of the black stuff had different colours in it as well. I left it in the sun to see if it would go sticky but it was rock solid as it were. Any ideas??? Many thanks once again. Claire http://www.mindat.org/forum.php?read,11,258745,258745#msg-258745 Sat, 18 May 2013 17:40:13 +0000 Phorum 5.2.15a http://www.mindat.org/forum.php?read,11,258745,261440#msg-261440 http://www.mindat.org/forum.php?read,11,258745,261440#msg-261440
Many thanks... when I first glanced at it, I thought similar but then a closer inspection showed the black stuff with almost irredence in it and the smell of arsenic was a wee bit overpowering! So that kinda put a halt on my sea theory. I have since found out there is some sort of factory up river..... dont know if that has anything to do with it, but I have since also found other bits similar in the river bed as well...

By the way, I went to the Geological museum to try and find out about your rocks... I spent most of the day there (easiily done - rocks :) ) but could not really find anything that looked similar apart from mica and graphite! I know of graphite mine in Derbyshire/Pennines..... but......????

Will try again when I have time....

Claire]]> claire Brimson Identity Help Tue, 22 May 2012 17:58:05 +0000 http://www.mindat.org/forum.php?read,11,258745,261368#msg-261368 http://www.mindat.org/forum.php?read,11,258745,261368#msg-261368 Heath Barnes Identity Help Mon, 21 May 2012 21:19:23 +0000 http://www.mindat.org/forum.php?read,11,258745,261134#msg-261134 http://www.mindat.org/forum.php?read,11,258745,261134#msg-261134
I put it on the railroad here as it just stank and was unsafe in smell (arsenic), so now the railroad smells :-D

Thank you very much for your help with this one and with all my queryries on rocks. I learn from you all.

Kiitos

Claire]]> claire Brimson Identity Help Fri, 18 May 2012 18:58:06 +0000 http://www.mindat.org/forum.php?read,11,258745,261132#msg-261132 http://www.mindat.org/forum.php?read,11,258745,261132#msg-261132 Paul Brandes Identity Help Fri, 18 May 2012 18:52:00 +0000 http://www.mindat.org/forum.php?read,11,258745,261129#msg-261129 http://www.mindat.org/forum.php?read,11,258745,261129#msg-261129 Jolyon & Katya Ralph Identity Help Fri, 18 May 2012 18:40:53 +0000 http://www.mindat.org/forum.php?read,11,258745,261126#msg-261126 http://www.mindat.org/forum.php?read,11,258745,261126#msg-261126 Heath Barnes Identity Help Fri, 18 May 2012 18:34:17 +0000 http://www.mindat.org/forum.php?read,11,258745,261125#msg-261125 http://www.mindat.org/forum.php?read,11,258745,261125#msg-261125
No, it wasnt that, But.... I do have some of that as well!

Very many thanks for turning up here - tis great to have Finnish guy on here as wel who is local l :-)

Claire]]> claire Brimson Identity Help Fri, 18 May 2012 18:33:39 +0000 http://www.mindat.org/forum.php?read,11,258745,261119#msg-261119 http://www.mindat.org/forum.php?read,11,258745,261119#msg-261119 do you think it could be Arsenopyrite or Löllingite?
try to clean the surface (brush or knife) somewhere.
see this small piece of löllingite from kaatiala after som cleaning
regards PekkaR]]> Pekka Ruoho Identity Help Fri, 18 May 2012 18:01:28 +0000 http://www.mindat.org/forum.php?read,11,258745,259224#msg-259224 http://www.mindat.org/forum.php?read,11,258745,259224#msg-259224
Many thanks also. Which sort of tests should I try please?

Claire]]> claire Brimson Identity Help Thu, 26 Apr 2012 17:45:33 +0000 http://www.mindat.org/forum.php?read,11,258745,259071#msg-259071 http://www.mindat.org/forum.php?read,11,258745,259071#msg-259071 Sam Cordero, Jr. Identity Help Wed, 25 Apr 2012 16:33:46 +0000 http://www.mindat.org/forum.php?read,11,258745,259053#msg-259053 http://www.mindat.org/forum.php?read,11,258745,259053#msg-259053
Kiitos

Claire]]> claire Brimson Identity Help Wed, 25 Apr 2012 14:35:47 +0000 http://www.mindat.org/forum.php?read,11,258745,258982#msg-258982 http://www.mindat.org/forum.php?read,11,258745,258982#msg-258982 Anyway, if it smells like arsenic, you must take care with it!
Greetings.]]> Jose Zendrera Identity Help Tue, 24 Apr 2012 20:53:21 +0000 http://www.mindat.org/forum.php?read,11,258745,258949#msg-258949 http://www.mindat.org/forum.php?read,11,258745,258949#msg-258949
Many thanks

Claire]]> claire Brimson Identity Help Tue, 24 Apr 2012 15:29:06 +0000 http://www.mindat.org/forum.php?read,11,258745,258921#msg-258921 http://www.mindat.org/forum.php?read,11,258745,258921#msg-258921 Just a guess: Perhaps a silex nodule in calcareous rock?
Greetings.]]> Jose Zendrera Identity Help Tue, 24 Apr 2012 10:11:17 +0000 http://www.mindat.org/forum.php?read,11,258745,258745#msg-258745 http://www.mindat.org/forum.php?read,11,258745,258745#msg-258745
Found this again in Oulujoki riverbed under the ice, was digging ice! Finland. It absolutly stinks of Arsenic! The black stuff on top cannot be marked with a penknife only a pegmatite leaves a scratch and there is a streak of grey/black to it. The rest of the rock leaves a streak of black also and is much softer - easy to scratch with penknife! I have not as yet tried to hit it to see if garlic is realesed. It is also heavy. Some of the black stuff had different colours in it as well. I left it in the sun to see if it would go sticky but it was rock solid as it were.

Any ideas???

Many thanks once again.

Claire]]> claire Brimson Identity Help Sun, 22 Apr 2012 18:19:29 +0000