Obsidian Glass

This is the main board for discussing general techniques, tools, and processes for fusing, slumping, and related kiln-forming activities.

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whitejoyce
Posts: 28
Joined: Sat May 10, 2003 6:06 pm
Location: Phoenix,AZ

Obsidian Glass

Post by whitejoyce »

Good Morning/Afternoon

I would like to know what would obsidian glass be compatible too?

In addition to that would some tell me what is obsidian glass?

Thank you all in advance for any info,suggestions & comments.
J. White
rosanna gusler
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Post by rosanna gusler »

obsidian glass is a volcanic glass. i doubt that it is compatible to anything other than it's own lump. it melts at 22 gabillion deg. rosanna
Doug Randall
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Post by Doug Randall »

Is that a Gabillion degrees Farenheit or Celsius? :lol:
whitejoyce
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Joined: Sat May 10, 2003 6:06 pm
Location: Phoenix,AZ

Post by whitejoyce »

Well that is interesting, i will let you know what happens in about & hour or so. I found some and now I testing it.

Thanks for that info
J. White
whitejoyce
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Location: Phoenix,AZ

Post by whitejoyce »

I tried that Obsidian glass, you know you was right that stuff does not cook. lol

I guess I will break it up and gring it into what I want.

Thanks for info.
J. White
Brad Walker
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Re: Obsidian Glass

Post by Brad Walker »

whitejoyce wrote:I would like to know what would obsidian glass be compatible too?

In addition to that would some tell me what is obsidian glass?

Thank you all in advance for any info,suggestions & comments.
Obsidian glass is volcanic glass. It's probably not compatible with anything.

I have tried melting it, heated it to 2300F and nothing happened. Didn't even get soft. I've been told by some of the glassblowers than you can melt it, but it takes a lot of heat. The melting point depends on the color of the obsidian, the darker the glass the higher the temperature.
Goldfinger
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Location: Missouri

Obsidian Glass

Post by Goldfinger »

Obsidian glass is essentially silica with Magnesium and Iron as impurities.
This explains the high melting point.

Steve
whitejoyce
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Joined: Sat May 10, 2003 6:06 pm
Location: Phoenix,AZ

Post by whitejoyce »

Thanks everyone,

I know it was very dark, like black and it did not even bulge.

Thanks for all the info
J. White
Brian and Jenny Blanthorn
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Re: Obsidian Glass

Post by Brian and Jenny Blanthorn »

whitejoyce wrote:Good Morning/Afternoon

I would like to know what would obsidian glass be compatible too?

In addition to that would some tell me what is obsidian glass?

Thank you all in advance for any info,suggestions & comments.
If U get a realy thin shard of it in the correct direction U may C fine stripes like a moyay pattern

Brian
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