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 The ACMS is open to physicians who have successfully completed advanced fellowship training in Mohs micrographic surgery, pathology, and reconstructive surgery. The ACMS currently has more than 1,300 member physicians. In 1995, an ancillary group called The American Society for Mohs Histotechnology was founded. The organization is composed of more than 375 non-physician laboratory technicians who process the slides evaluated during a Mohs procedure. The purpose of the ACMS is to "promote and advance high standards of patient care" with respect to Mohs surgery and other forms of cutaneous oncology through fellowship training, research, education, and public advocacy. The American