The present invention relates to an article comprising at least one of a glass or glass-ceramic comprising at least 35 percent by weight Al 2 O 3 , based on the total weight of the glass or glass-ceramic, and a first metal oxide other than Al 2 O 3 , wherein the glass or glass-ceramic contains not more than 10 percent by weight collectively B 2 O 3 , GeO 2 , P 2 O 5 , SiO 2 , TeO 2 , and V 2 O 5 , based on the total weight of the glass or glass-ceramic.