* Metallic minerals typically have a shiny, reflective surface, resembling the shine of polished metal. They can be described as having a metallic luster.
* Nonmetallic minerals often have a dull, earthy, glassy, or pearly luster, depending on the specific mineral. They do not reflect light in the same way as metals.
Of course, there are other ways to distinguish metallic and nonmetallic minerals, including:
* Color: Many metallic minerals have distinctive colors like gold, silver, copper, or bronze.
* Streak: The color of a mineral's powder when rubbed against a streak plate. Metallic minerals often have a dark streak.
* Hardness: Metallic minerals are typically harder than nonmetallic minerals.
* Conductivity: Metallic minerals are excellent conductors of heat and electricity.
While luster is a helpful starting point, it's essential to consider multiple properties for accurate identification.
