rensselaerite

from WordNet (r) 3.0 (2006)

rensselaerite
    n 1: a kind of soft talc; sometimes used as wood filler

from The Collaborative International Dictionary of English v.0.48

Rensselaerite \Rens"se*laer*ite\ (r?ns"se-l?r-?t), n. (Min.)
   A soft, compact variety of talc,, being an altered pyroxene.
   It is often worked in a lathe into inkstands and other
   articles.
   [1913 Webster]