What do symmetrical crystal shapes indicate about a mineral?

Answer;

It indicates that it is a metallic luster

Explanation;

-The physical properties of minerals comprise various measurable and discernible attributes, including color, streak, magnetic properties, hardness, crystal growth form, and crystal cleavage. Each of these properties are mineral-specific, and they are fundamentally related to a particular mineral's chemical make-up and atomic structure.

-Mineral crystals form in many different shapes and sizes. A mineral is made up of atoms and molecules. As the atoms and molecules combine, they form a particular pattern.