posted on Dec, 7 2011 @ 12:14 PM
copperhead12 I am a geologist but I mainly specialise in iron ore so I'm slowly losing all knowledge of other minerals unfortunately. But I can point
you in the right direction. It sounds too heavy (specific gravity 5-6 i think you said) to be anything to do with iron (which would rule out hematite
assuming the assesment you posted is accurate). Do they feel much heavier than a 'normal' rocks of comparable size?
It is likely, due mainly to the streak and specific gravity, that it is a chunk of silver-lead-copper ore from somewhere as said in the assessment. It
may be a mineral called sphalerite mixed with silver, especially if they reckon it's a tetrahedrite - which just refers to the crystal shape which
would grow if it were to form in a fluid filled void. Do you live anywhere near Kansas? There's a lot of that stuff near there. Where approximately do
you live? Or more to the point, where do you think the rocks originated from?
But I'm actually thinking it's probably just simply be a mixture of silver lead and copper with no molecular bonding in which case it would have no
name at all. It would simply be silver-lead-copper ore. Many of these things just don't have a name so hopefully that's not what you were after.
Upload some better in focus
pics, preferably taken outside with natural (but not too harsh) sunlight but no flash. And scratch the metallic
part with something sharp like a nail and tell me what color the streak is - that is the powder scratched up, not the metal the nail may or may not
leave behind on the rock( or if you have rough porcelain with no enamel scratch it on that). Also tell me if there's any rusty red components to the
streak or the weathered outer crust.
edit on 7/12/2011 by 1littlewolf because: (no reason given)