What are the key characteristics that make Galena easy to identify as a mineral?
Galena is easy to identify by its high specific gravity, usually around 7.4 to 7.6. It also has perfect cleavage planes and a metallic luster. Despite its metallic appearance, Galena is classified as a non-metallic mineral.
Specific Gravity
Galena is a mineral composed of lead sulfide (PbS) and is the primary ore of lead. It has a metallic luster, silver-gray color, and exhibits perfect cleavage. Galena is significantly heavier than most other minerals due to its high specific gravity, making it stand out when compared to minerals of similar appearance.
Perfect Cleavage
Galena also exhibits perfect cleavage, meaning it breaks along smooth, flat planes, often forming cubic or octahedral shapes. This perfect cleavage is a distinctive characteristic of Galena and aids in its identification.
Non-Metallic Classification
Despite its metallic luster, Galena is classified as a non-metallic mineral based on its chemical composition and physical properties. This classification sets Galena apart from other metallic minerals, adding to its uniqueness in the mineral world.