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
Mohs surgery by ease of hemostasis is weighed against the risk of stopping anticoagulants; and it is generally preferred to continue anticoagulants. Few specialists dispute the cure rate for Mohs, especially pathologists familiar with the procedure. Extensive studies performed by Mohs involving thousands of patients with both fixed tissue and fresh tissue cases have been reported in the literature. Other surgeons repeated the studies with also thousands of cases, with nearly the same results. Clinical 5 year cure rates with Mohs surgery: These are only a small number of cases reported by Mohs, and numerous other articles by other authors have shown