What are the two main types of luster? A. dense and porous B. coarse and smooth C. metallic and nonmetallic D. striated and non-striated

The answer is C. Metallic and Non-metallic.

Explanation:

Luster is a physical property that shows how light acts on the surface of a material and how it is reflected in it. The main types of brightness are:

Metallic shine = This type of shine occurs in metals, since they are very opaque and whose surface has a lustrous appearance, that is, it totally reflects light. Non-metallic shine = This type of shine is presented in minerals with a light color, produced by transparent substances, such as the diamond.

The answer is metallic and nonmetallic.