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
American College of Mohs Surgery College of Mohs Surgery offers professional recognition to physicians proficient in Mohs surgery. The ACMS also offers opportunities for continuing education, as well as an annual meeting with speakers and industry exhibitors. The ACMS aims to "improve the clinical and aesthetic outcomes of Mohs surgery" by requiring physicians to undergo a rigorous fellowship training process as well as ongoing education. The ACMS also allows patients to access information and locate credentialed physicians throughout the United States. American College of Mohs Surgery The American College of Mohs Surgery (abbreviated as ACMS) is a membership-based organization of surgeons who are fellowship-trained in