Friedrich Mohs harder. This became the basis of the hardness scale developed by Mohs. The hardest mineral, diamond was given a value of 10 and softer minerals such as talc were given the very low value of 1 (unity). Other minerals were given intermediate values, depending on their ability to scratch another mineral in the scale. Thus gypsum was given the value 2 because it will scratch talc crystals, and calcite the value 3 because it will scratch gypsum. Minerals are also now classified by chemical characteristics, but the physical properties are still useful in field examination. In 1812, Mohs became a
Mayo Mohs 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 for "Time" on theology and science fiction. A native of St. Paul, Minnesota, Mr. Mohs has been a history teacher and a reporter for the "Cincinnati