help with id

[chevyman75]

I found a rock. It is black and shiny just looking at it and when an led light is put under it its a really dark purple with little specs in it and other then the edges is a lighter purple. I tried to post a photo but i cant figure it out on this kindle fire.. will try and post a picture later or tomorrow. Figured maybe this would be enough to maybe identify it

 

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[chevyman75]

Ya its not flint and its about an 1/8 -1/4 inch thick kinda tapers off a bit and what characteristics does tourmaline have? Pics online somewhat resemble that also. Im gonna look up sea glass and see if it has a resemblace to my piece im still workin on getting a pic with the light shining through it

 

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[chevyman75]

Sea glass has the wrong texture from what im seeing and the bubbles are not like the dirt or whatever is incased in my rock.

 

[GatorBoy]

Depending on how much silica is in the piece plenty of light passes through certain types of obsidian.

 

[chevyman75]

here is a pic of it over the light. its not the greatest but best i could get....

 

[mamabear]

I have a lot of obsidian that has light & dark striations in it. You can only see them when held against a light. I have had hours of fun just looking through them. & yes I guess I am easily entertained.