i can't be sure but the first looks like some kind of sulphide marble
the second might be an ore sample or broken refractory
the other two pieces may be firebricks or pieces of crucible or furnace lining
Linkback: You are not allowed to view links.
Please Register or Login
http://www.thunting.com/smf/index.php/topic,72545.msg332669.html#msg332669
|
|
Logged
|
IS IT SAFE YET ??
|