Almandine is a rock-forming mineral with a deep red color (slightly purple) belonging to the garnet group. Chemically, almandine is a iron-alluminium garnet with the formula Fe3Al2(SiO4)3.
The name almandine (also known as carbuncle) comes from Alabanda, a region in Asia where the minerals were firstly found in ancient times. The term carbuncle is derived from latin and means “live coal” or burning charcoal. Almandine occurs frequently in metamorphic rocks like mica schists, similar as in the photo above taken from a small piece of conglomerate found on a beach at Baltic Sea.