transparent, translucent, crystal-clear, see-through, lustrous, vitreous, gleaming, glinting, sparkle, spangle, glisten, shine, reflective, refractive, magnify, irridescent, brilliant, prismic, glassy stare, icy, watery, pellucid, frosted, filmy, screen, filter, pane, opaque, cloudy, crizzled, crazed, fragile, shattering, shatter-proof, brittle, sharp, shattered, jagged, splinter, shard, polished, burnished, glazed, glacé, toughened, exclusion, inclusion, facetted, fissile, cut, conductive, liquid, solid, fractured, ductile
but I am sure there are lots more.
Picture is some fractured glass from http://www.uroboros.com/
