alabaster

Concise Oxford English Dictionary © 2008 Oxford University Press:
alabaster /ˈaləbɑːstə, -bastə, ˌaləˈbɑːstə, -ˈbastə/

▶noun

• 1 a translucent form of gypsum, typically white, often carved into ornaments.

• 2 [as modifier] literary smooth and white: her alabaster cheeks.

– origin ME: via OFr. from L. alabaster, alabastrum, from Gk alabastos, alabastros.