Mineralogy classified into density (often given as specific gravity); measures of mechanical cohesion (hardness, tenacity, cleavage, fracture, parting); macroscopic visual properties (luster, color, streak, luminescence, diaphaneity); magnetic and electric properties; radioactivity and solubility in hydrogen chloride (). "Hardness" is determined by comparison with other minerals. In the Mohs scale, a standard set of minerals are numbered in order of increasing hardness from 1 (talc) to 10 (diamond). A harder mineral will scratch a softer, so an unknown mineral can be placed in this scale by which minerals it scratches and which scratch it. A few minerals such as calcite and kyanite
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