9 letters · 11 points in Scrabble
noun a soft heavy compact variety of talc having a soapy feel; used to make hearths and tabletops and ornaments
originFrom soap + stone; so called because the archetypal varieties of the stone resemble soap in multiple ways: their feel, appearance, and carvability. First use appears c. 1681, in the writings of Nehemiah Grew.
Etymology from Wiktionary, CC BY-SA 3.0