Mineral necessarily constant for all sides, which is a function of its structure; crystallographic weakness renders some directions softer than others. An example of this property exists in kyanite, which has a Mohs hardness of 5½ parallel to [001] but 7 parallel to [100]. The most common scale of measurement is the ordinal Mohs hardness scale. Defined by ten indicators, a mineral with a higher index scratches those below it. The scale ranges from talc, a phyllosilicate, to diamond, a carbon polymorph that is the hardest natural material. The scale is provided below: Lustre indicates how light reflects from the mineral's
Mayo Mohs Times Star". He is currently working on a book about the religious ferment in Cuernavaca, Mexico." Mohs died on August 22, 1996, in Santa Monica, California. Mayo Mohs Mayo A. Mohs (March 23, 1934 – August 22, 1996) was the editor of the 1971 science fiction anthology "Other Worlds, Other Gods: Adventures in Religious Science Fiction" (Doubleday & Company, 1971, Library of Congress Catalog Card Number 76-144282.) Per the jacket of that book, "Mayo Mohs is religion editor of "Time" magazine and a long-time science fiction buff. The idea for this collection was originally inspired by an article he wrote