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 terms used to describe luster are: 1  Metallic (also known as splendent). 2  Submetallic. 3  Vitreous (also known as glassy). 4  Adamantine (also known as brilliant or diamondlike). 5  Resinous (also known as resinlike). 6  Silky. 7  Pearly (also known as mother-of-pearl).8  Greasy (also known as oily). 9  Pitchy (also known as pitchlike).etallic-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.