Examples include silica gel, fumed silica, talc, and magnesium carbonate. Alteration products include mica, chlorite, and talc. Inorganic compounds are processed minerals such as iron oxides, talc, and zinc oxide. Inactive ingredients include talc and zinc oxide. It is composed largely of the magnesium rich mineral talc. Associated mineral phases include&colon; corundum, apatite, serpentine, and talc. It is now usually made of talc (magnesium silicate). Garnets can be chemically altered and most often alter to serpentine, talc, and chlorite. It contains exploited deposits of nephrite, talc and asbestos. Other formulas use limestone, talc, or fish oil. Soapstone is a metamorphic rock composed predominantly of talc. It occurs associated with staurolite, andalusite, sillimanite, talc, hornblende, gedrite, mullite and corundum. Some brands of hand chalk actually are made of compressed talc. A 1971 paper found particles of talc embedded in 75% of the ovarian tumors studied. This is an area of very specialized products, including talc, industrial garnets, and zinc.