I'd be willing to try it if I could find the stuff. It is not an easy thing for me to grind up quartz. Looking at the Pearl catalogue in the section for mediums there is a pebeo crystal mortar that is made for acrylics. It is described as: acrylic, quartz and glass based thick mortar. Obtains granular and transparant effects. Since according, at least, to the above mentioned book there is scientific evidence of this practice by the big "R" himself, I'm curious; although it seems that for the most part this information is not widely known.
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