6.6c Test the physical properties of minerals, including hardness, color, luster, and streak.
Classify/Classification - Sort or put into groups based on similar and dissimilar physical, chemical, or biological characteristics
Conductivity - The ability of a substance to transfer heat or electrical energy
Luster - The way the surface of a mineral reflects light; either metallic or non-metallic such as silky, dull, glassy, or resinous