A: Fiction. Antibiotics used in animals are the cause of major human drug resistant diseases. Myth: âAnimal antibiotics kill more people than breast and prostate cancerâ screamed a blogger in the wake of an AP story on antibiotics used to keep food animals healthy.
Mineral Luster. Luster is a description of the way a mineral surface looks when light reflects off of the surface. Luster has two categories, metallic and nonmetallic.
Metallic-Minerals with a metallic luster are opaque and reflective, like metal. The metal lic elements, most sulfides, and some oxides belong in this category. Submetallic-Describes a mineral that is opaque to nearly opaque and reflects well.Thin splinters or sections of submetallic minerals are translucent.inerals with a pitchy luster are usually radioactive and have gone through the process of metamiction. Waxy-A waxy luster describes a mineral that appears as if it were coated with a layer wax. Dull-This luster defines minerals with poor reflective qualities, much like unglazed porcelain.