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Found in Niagara Falls, Ontario

Posted by Jonathan Robidas  
Jonathan Robidas April 15, 2012 02:29AM
Found this at my place of work, less then 5km from Niagara Falls, I am a complete amateur when it comes to identification. Though I believe it may be quartz.

Any insight from the experts?

Its got some sparkle to it, and the drastic differences on each side has me confused. I am very curious to hear how you guys think it may have gotten this way.

Thank you all in advance
open | download - Rock1.jpg (146.4 KB)
open | download - Rock2.jpg (290.2 KB)
open | download - Rock3.jpg (190.6 KB)
Byron Thomas April 15, 2012 04:37AM
Slag from iron or steel production. it is very common and often mistaken for other rocks and minerals.

Andrew Johns April 15, 2012 05:53PM
Jonathan, where abouts in the Falls did you find the piece.. I know the area well, there were a few steel factories in the area many years ago and I know of some areas where slag was dumped..

Howard Heitner April 30, 2012 02:26AM
The first two pictures look like slag, the third one looks crystalline to me. Perhaps the specimen is a composite of slag with something else that did not melt in the furnace. Is there a distinct boundary between the two areas?
Ronald John Gyllenhammer April 30, 2012 02:54AM
Hi Jonathan,

I also think the first two are probably slag. Your third image of a white columnar aggregate may be Tremolite. Compare here: If it is Tremolite, it may be fluorescent so if you have a SW or LW source you may want to check this. Good luck.

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