Questions about rock inclusions

Suzanne Taggart · Post by **Suzanne Taggart** » Tue Mar 18, 2003 12:39 pm

My daughter collected tiny pieces of iron ore that wash out of our hill for inclusions in some glass tests I wanted to do. My husband became alarmed and suggested I post to the board.

I saw a wonderful bowl where the bottom was slumped over a mound of rocks - very cool which provided the inspiration....

Has anyone tried this? With what results....

Brad Walker · Post by **Brad Walker** » Tue Mar 18, 2003 12:45 pm

Some rocks have moisture in them and will explode or crack when heated in a kiln. If you're going to try this, first prefire the rocks to see how they react to the heat.

Suzanne Taggart · Post by **Suzanne Taggart** » Tue Mar 18, 2003 12:49 pm

Thanks for the warning. I suppose knowing something about geology would help here.....

By the way, I love the new format and find it so easy to use now....

Lynn Bishop · Post by **Lynn Bishop** » Tue Mar 18, 2003 11:35 pm

Don't forget to kilnwash the rocks first. Then remove after firing, wash, and glue on. Lynn Bishop

Kelly Burke Makuch · Post by **Kelly Burke Makuch** » Wed Mar 19, 2003 10:34 am

Has anyone tried encasing seashells? How did it work?

charlie · Post by **charlie** » Wed Mar 19, 2003 10:53 am

Kelly Burke Makuch wrote:Has anyone tried encasing seashells? How did it work?

they'll probably turn to powder at fusing temps. they're only calcium loosely held together.

Dick Ditore · Post by **Dick Ditore** » Wed Mar 19, 2003 1:47 pm

Some shells turn to powder, and some remain. Some just a ghost. You can slump, fuse over them on a bed of sand and get some shell design.

Dick

Jerry · Post by **Jerry** » Wed Mar 19, 2003 3:57 pm

About these rocks. Are they being encased? Is COE an issue? Does Quartz expand more than Granite? Are they just being used as a form to create a pedestal? Seems like I've seen something like this as well and had no idea how it was accomplished.

Appreciate the help,
Jerry

charlie · Post by **charlie** » Wed Mar 19, 2003 4:04 pm

Jerry wrote:About these rocks. Are they being encased? Is COE an issue? Does Quartz expand more than Granite? Are they just being used as a form to create a pedestal? Seems like I've seen something like this as well and had no idea how it was accomplished.

Appreciate the help,
Jerry

granite is mostly quartz. http://www.britannica.com/eb/article?eu ... ranite&ct=

there was something about an artist in (new mexico?) who does this. look in the old archives for references.

Bonita (Nita) Crawford · Thu Mar 20, 2003 12:50 am

I have tried two or three times to encase seashells in glass, both
float and BE but they crumbled and turned an ugly grayish color.

Warmly,
Nita

Reba · Post by **Reba** » Tue Jun 26, 2012 3:29 am

Suzanne Taggart wrote:My daughter collected tiny pieces of iron ore that wash out of our hill for inclusions in some glass tests I wanted to do. My husband became alarmed and suggested I post to the board.

I saw a wonderful bowl where the bottom was slumped over a mound of rocks - very cool which provided the inspiration....

Has anyone tried this? With what results....

hi, i was just thinking about how to get sand and rock in/on/under fused glass and came across this older post.

did anyone ever try slumping over rock? rock on sand?

thanks,

reba

ps i read that you can slump over shells on a sand bed with some results too.)

Lynn g · Post by **Lynn g** » Tue Jun 26, 2012 4:19 am

When you pre-fire the rocks, it's a good idea to put them under a stainless steel bowl...just in case they do explode, it will be contained.

JestersBaubles · Post by **JestersBaubles** » Fri Jun 29, 2012 9:46 pm

Reba wrote:
did anyone ever try slumping over rock? rock on sand?

At a class I took this year at the expo, one of the instructors had a piece where the bottom of a bowl was slumped over rocks. It was very interesting.

Dana W.

Mark Hall · Post by **Mark Hall** » Sun Jul 08, 2012 10:44 am

I've seen hot glass pick up rocks onto a gather, and casters pour including them in their molds - both with favorable results. However it's a crap shoot, with every rock different components. The ones I saw used were small and well-rounded.

Reba · Post by **Reba** » Thu Jul 19, 2012 12:59 pm

hi dana,

thanks for your feedback. i haven't seen it, but when someone on the board described "slumping glass over rocks on a bed of sand" it sounded lovely. also, i live on an island so i have lots of rocks and sand.

when you say the bowl was slumped over rocks, do you mean the bowl achieved its slumped shape from the rocks, or did the glass slump and contain the rocks?

thanks,

reba

JestersBaubles wrote:
Reba wrote:
did anyone ever try slumping over rock? rock on sand?

At a class I took this year at the expo, one of the instructors had a piece where the bottom of a bowl was slumped over rocks. It was very interesting.

Dana W.

Barb R · Post by **Barb R** » Thu Jul 19, 2012 1:10 pm

Here's the master at this:

http://www.gallery8010.com/collections/ ... Glass.html

Barb

JestersBaubles · Post by **JestersBaubles** » Thu Jul 19, 2012 9:27 pm

[quote="Reba"]hi dana,

when you say the bowl was slumped over rocks, do you mean the bowl achieved its slumped shape from the rocks, or did the glass slump and contain the rocks?

thanks,

reba

[quote="Reba"]

The rocks were not included in the bowl -- they were kiln-washed and the glass slumped over them.

Dana

WarmGlass.com

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