The two properties being measured if a mineral has a metallic shine and scratches are;
A. luster
B. hardness
To answer this question, let us analyze the properties in each of the given options;
Option A; Luster; This property is one that gives metals a shiny feel such that they appear polished and can reflect light shining on it.
Option B; Hardness; This is the property of a metal that tests its' ability to withstand friction and abrasion. Thus, the more difficult it is to disfigure it, the stronger it will be.
Option C; Magnetism; This is a property of metals that shows its' ability to attract magnets and not repel them.
Option D; Cleavage; This is usually applied to minerals to test if the break when a particular amount of stress is exceeded on one of its' planes.
Looking, at the definitions of each option, the only ones that apply to shine and scratch impacts on a metal are Options A & B.
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