The name is from the Greek spodos, meaning burnt to ash. Spodumene is a silicate mineral often referred to as lithium feldspar. Its mineral form is characterized by hard needle-like grains of brilliant white color. It is used in ceramics as a source of lithia.

Lithia is a very powerful flux, especially when used in conjunction with potash and soda feldspars. As one of only a few natural lithium source materials, spodumene is a valuable component in glass and ceramic/enamel glazes (Li2O reduces thermal expansion, melting temperature and viscosity of the glaze melt).

Spodumene is only slightly soluble (in contrast to lithium carbonate). Because spodumene is a natural combination of silica, alumina and lithia it melts better than a chemically equivalent mixture of lithium carbonate, kaolin and silica. Since almost all raw glazes contain kaolin and silica it is normally fairly easy to juggle recipe ingredients in a ceramic chemistry calculation program to introduce spodumene to replace lithium carbonate.

Some types of spodumene do contribute to the formation of bubbles in the glaze slurry. Spodumene is a little more readily fusible than petalite since it is higher in lithium.

Article from http://digitalfire.com

So I add a mixture of pure 1:1. Gypsum mold first broken into small pieces using jaw crusher and then milled again using hummer mill, to create a more refined grains, then filtered. Prepare a big aluminum pan, enter the gypsum powder which was filtered, cook with fire enough, recommended using a wide range head. Toss and roll on, first it was heavy, but when it’s slow enough to be light. After a fairly mild, just be lifted. cooled to be used. I do not measure how many degrees at the time to mature. To make gypsum from the raw materials I’ve never tried. I read in the literature contains gypsum hydrated calcium sulfate (CaSO4.2H2O), the more content the better   (like gypsum Paris). CaSO4.2H2O containing among others: Selenite, Alabaster, Satin Spar which is the staple manufacture Gypsum. Raw materials are all transparent like crystal. Maybe you’ve heard from Marble Alabaster craft? How do I manage it? do not ask about it because I have never made. Anyone?