Last month I ordered these low fire glazes called "Jungle Gems" from Mayco. Pretty hokey name, pretty cool results. They have small glass crystals suspended in a glaze base that melt during the low-firing process (cone 06 for me). A little tricky to apply--being the type A person, wanting even distribution and all. Some turned out deliciously glossy, others a little matte for my taste. But pretty cool, nonetheless. Like pop rocks for your clay!