"Prism periods" variety. Has a number of small spots where it bumped up against some of its kin while cooling, and that's a deep straw mark behind the C and not a crack... only real damage is a 1-1/2" base bruise at the left mold line (no glass missing) that disappears on display. Nice chunk of firebrick in the right dome too, and a slight bit yellower than the pic shows. Another great color for the beehive display -- $26 + shipping, and thanks for looking.