#cubic system
- Alabandite — A rare mineral from the sulfide class, consisting of a native manganese sulfide with the chemical formula MnS; it crystallizes in the cubic system and usually occurs as granular or massive aggregates of yellowish-black or brown color, featuring a characteristic submetallic luster. This structural component frequently appears in low-temperature hydrothermal veins associated with other complex sulfides or in contact-metamorphosed manganese deposits, being utilized as a petrological indicator in establishing precision mineral fusions.
- Almandine — A silicate mineral representing the most widespread and common species of the garnet group, featuring a characteristic deep red, purplish-red, reddish-brown, or black color, containing iron and aluminum. It crystallizes in the cubic system, has a vitreous luster, and high hardness (7-7.5 on the Mohs scale), with its transparent varieties utilized since antiquity as semi-precious gemstones in jewelry and opaque ones as industrial abrasives.