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.
The term luster is used to describe the way a mineral surface looks when light is reflecting off of it. Luster is considered a basic descriptive parameter for minerals but varies somewhat even within a single crystal, which limits the termâs usefulness in categorizing gemstones and minerals.alc is an example of a mineral with a pearly luster. The term resinous is used to denote minerals that resemble resin, such as sphalerite. Minerals with a greasy luster appear as though they have a layer of oil or fat coating them. An example of a mineral with a greasy luster is graphite.