nikkelbl
Nikkelbl is a rare and distinctive mineral that belongs to the sulfide group. It is primarily composed of nickel and sulfur, with the chemical formula Ni3S2. The mineral is known for its metallic luster and its distinctive black color. Nikkelbl is typically found in low-temperature hydrothermal veins and in serpentinite rocks. It is often associated with other nickel-bearing minerals such as millerite and pentlandite. The mineral has a hardness of approximately 5.5 on the Mohs scale and a specific gravity of around 5.8. Nikkelbl is not commonly used in industry due to its rarity and the presence of more abundant and economically viable nickel minerals. However, it is of interest to mineralogists and collectors for its unique properties and aesthetic appeal. The mineral was first described in 1845 from the type locality of the Nikkel mine in Norway.