Tuesday, November 18, 2008


A friend of mine gave me a bucket of stuff that was labeled spodumene when she retired from making pottery. The stuff looks like a gray talc -- I was suspicious of it and so piled up a teaspoon or so of it in the middle of this glaze catcher and fired it to cone 10 in oxidation. It's very brown and unlike what I hoped it would be. 

I know that for awhile there were some high iron spodumenes going around. Could this be one of those? Any other ideas. 


gayelynn said...

The stuff that you describe sounds like spodumene as we knew it about 10 years ago. When we ran out and bought a new bag (about 10 years ago), the new spodumene looked white and crystalline. They both performed the same in the glazes (c 10) that we mixed, that required spodumene - the melt and texture was the same, that is. The old, gray-ish talc actually gave a much nicer, warmer color when the glaze was used over porcelain or a white clay. Recently, we've used the glaze with the new "white" spod over a darker stoneware body with some nice warm results. Circumstantial evidence would say that the old spod was the iron bearing spodumene -- less refined than the one that seems to be widely available now - maybe?
I'm new to the clay blogging realm. ...nice pots and blog-

Earl and Vickie said...

I agree, the stuff I used to love in the 70's was gray, and actually made the glaze a little foamy when added.

Crafter of Khnum said...

Here is a hyperlink to a description of the mineral (LiAlSi2 O6).

Crafter of Khnum said...

Could it be Amblygonite? Amblygonite is also called low melt Spodumene.