Need help identifying an object

[webster603]

This piece belonged to my grandmother and is quite old. I have had it for around 30 years since she passed away. Something in my memory thinks i was told it was a meteorite but I can't find any that look similar so am doubtful. It is black, very pointed and sharp and when light hits it, it has a rainbow effect. I can't find anything when I look at rock and mineral specimens either. Your help would be greatly appreciated!

 

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[DDancer]

A better closer picture will help. Its not a meteorite as they do not exhibit crystal formation. It does appear to be a conglomerate of crystals.

 

[webster603]

A better closer picture will help. Its not a meteorite as they do not exhibit crystal formation. It does appear to be a conglomerate of crystals.

I dont think there are any crystals but the light play? Here are 2 more pictures. I hope they help.

 

[webster603]

Could it be pyrolusite?

 

[DDancer]

Scratched my head on this for a bit. Seems you've found a likely candidate for your research. I don't know any good way to test your guess so I'll say yes It matches images I've dug up.

 

[Brian T. Booth]

This piece belonged to my grandmother and is quite old. I have had it for around 30 years since she passed away. Something in my memory thinks i was told it was a meteorite but I can't find any that look similar so am doubtful. It is black, very pointed and sharp and when light hits it, it has a rainbow effect. I can't find anything when I look at rock and mineral specimens either. Your help would be greatly appreciated!<img src="http://www.treasurenet.com/forums/attachment.php?attachmentid=1017807"/>

What you have is Bornite. Great specimen. Images of the mineral below. Happy hunting.

 

[webster603]

Thank you so much!