Please help identify the material

[Ozida 0]

Hi there,

Wondering if anyone could help me identify this rock/glass/thing. 

Found in northern Ontario, Canada, in a pine wood not far from water. Originally covered in a grayish crust, which I barely managed to take off by 60-grit sandpaper (some crust can still be seen in the photos below).

The piece is fairly light (18g). When heated, it does not melt and/or produce any smell. It’s not magnetic. Hard to break (managed to chip a few smaller pieces with a help of pry bar and a hammer).

Dark brown with some gold, somewhat see-through on light. Many internal scratches and a few tiny air bubbles.

Thanks in advance for any tips/ideas!

1. Side view -1: http://s000.tinyupload.com/index.php?file_id=55207721827330970020
2. Side view -2: http://s000.tinyupload.com/index.php?file_id=27420301959146811367
3. Side view -3: http://s000.tinyupload.com/index.php?file_id=61701579336150764755
4. Fron view: http://s000.tinyupload.com/index.php?file_id=39964980694974088328
5. Chipped side -1: http://s000.tinyupload.com/index.php?file_id=07257296844360863182
6. Chipped side -2: http://s000.tinyupload.com/index.php?file_id=01909660207315445216
7. Daylight see-through: http://s000.tinyupload.com/index.php?file_id=05467695300996656440
8. Intesive light: http://s000.tinyupload.com/index.php?file_id=48366861124108723519

Edited April 19 by Ozida
Photos uploaded

[Diggingd 35]

I'm definitely not expert, but it definitely resembles fire agate, but I'm sure if you can do all the test the fellow guys here they could probably do a better job identifying it! Just remember it is hard to tell just off a picture everyone will tell you that. 

[d_day 223]

Well, if there are air bubbles, it’s most likely to be slag. I thought maybe copal or amber, but your heating of the piece eliminated those possibilities. 

[Ozida 0]

Diggingd & d_day - thanks for your replies! Not expecting anything fancy of it, very well may be the slag. 

[4meter 167]

I think Diggingd is spot on the ID of the sample.  Your sample looks very much like the small pieces of  Fire Agest from S.E. Arizona

[Bedrock Bob 2,812]

 

Agate is pretty durable, hard stuff. When it fractures the broken faces are short and often end in step or hinge fractures. This specimen has long, thin flakes that end in a feather edge. The fractured have ripples. This indicates a much softer material like glass or obsidian.

If there are little bubbles in it I would say it is opalite glass. A crafts creation. I have a friend who makes jewelry and she does opalites. That looks like something that might have been left over after she formed her little jewels.

A hardness test would differentiate glass from agate. I have no idea what it is but the fractures look like glass to me.

 

[Haderly 80]

It is not fire agate. I would bet on slag or obsidian. The rainbow is probably light being refracted through an internal fracture.

[d_day 223]

Definitely not fire agate. The small bubbles inside preclude agate.

[Morlock 1,248]

I'm thinking slag.

[Ozida 0]

Thanks for responding, everyone! Much appreciate everyone's input.