Marble quarries can be found in a great number of locations around the world. A beautiful pink calcite marble, for instance, is quarried in Canada near Madoc, Ontario. High quality white and gray marbles are mined, on the other hand, in Alabama, Georgia, Vermont, and in a number of other locales, while the Tuscany region of Italy supplies a reddish marble and the quarry near Mexico City is better known for a brown or yellow marble. Also, shell-containing bluish, gray, or green limestone marbles, which were quite popular during the medieval period, are found in England and are well known for their use in the construction of Westminster Abbey and a number of other stunning cathedrals.