Crowningshieldite
Crowningshieldite is a hexagonal sulfide mineral with the chemical formula (Ni0.9Fe0.10)S. It is primarily composed of nickel and sulfur, with a minor iron component. As a member of the sulfide mineral class, it is relatively rare and is known for its metallic luster and dark gray to black color. It has a hardness of approximately 3.5 to 4 on the Mohs scale and a moderate density. Crowningshieldite is typically found in association with other sulfide minerals and is of interest to mineralogists due to its specific nickel-rich composition and hexagonal crystal structure.
Overview
Crowningshieldite is a hexagonal sulfide mineral with the chemical formula (Ni0.9Fe0.10)S. It is primarily composed of nickel and sulfur, with a minor iron component. As a member of the sulfide mineral class, it is relatively rare and is known for its metallic luster and dark gray to black color. It has a hardness of approximately 3.5 to 4 on the Mohs scale and a moderate density. Crowningshieldite is typically found in association with other sulfide minerals and is of interest to mineralogists due to its specific nickel-rich composition and hexagonal crystal structure.
How to recognize it
Crowningshieldite can be identified by its metallic luster and dark gray to black color. It has a hardness of 3.5 to 4 on the Mohs scale, which is relatively soft for a sulfide mineral. A streak test will yield a dark gray to black streak. Its moderate density and hexagonal crystal system can also aid in identification. It may be confused with other nickel sulfide minerals, but its specific chemical composition and crystal habit help distinguish it.