The Collaborative International Dictionary
Marver \Mar"ver\, n. [Prob. corrupt. fr. OE. or F. marbre marble.] (Glass Marking) A stone, or cast-iron plate, or former, on which hot glass is rolled to give it shape.
Wiktionary
n. (context glassblowing English) A flat heat-proof surface, on which a gather of glass is rolled into shape. vb. To roll glass on a marver.
Wikipedia
A Marver is a tool used in glassblowing. It generally is made of a polished steel surface attached to a metal or wooden table. A warm piece of glass is rolled on the marver, for two reasons: controlling temperature and adjusting shape. Because of the high specific heat capacity of the steel, it can absorb heat from the glass, particularly the outer skin. Because the glass comes in direct contact with the steel, it must be kept very clean. It is usually rubbed with steel wool and then wiped with rubbing alcohol to keep it from rusting.
Category:Glass art
Usage examples of "marver".
But gradually I learned to feel the proper rotation of the mandrel, guess at the chill marks when I touched a bead too long to my marver, the heat-proof working surface.