Definition of zebra stone

Zebra stone is simply a commercial name for a banded brown and white sedimentary rock found in the Kimberley region of Western Australia. It is colorful, relatively soft and takes a good polish so it became popular with lapidarists and stone cutters. The original source, found over 50 years ago, was covered by Lake Argyle after construction of the Ord River dam. I see it is still coming on the market so presumably they have found another source. I know nothing about the Brazilian material.

Comment on Mindat.org Message page by Stephen Turner.
Also see http://www.minsocam.org/ammin/AM16/AM16_221.pdf