Name:
There is some confusion over what should correctly be called Marcasite. Originally the name Marcasite was applied by mineralogists to an unstable form of iron sulphide crystallising in the rhombic system. The Marcasite found in jewellery is also iron sulphide, with the same chemical composition, but crystallising in the cubic system. Both forms are also called pyrites or iron pyrites.
Marcasite should be pronounced "markazeet", not "marquisite", and pyrites should be pronounced "pie-right-eeze", not "pie-rights".
Description:
The non-gem Marcasite is yellow and may exhibit some green tints. It may also have white or brown colorations. It is a relatively soft stone with a hardness of approximately 6-6.5 on the Moh’s Hardness scale. It forms into what are called coxcomb aggregates, where the crystals are separated into crystals that are similar in shape to the head of a top of a rooster’s head. Because of this special formation, Marcasite is prized in collections.
Marcasite is the name given the mineral iron sulphide, which is mined all over the world. However, most of the gem called Marcasite used in jewellery is actually iron pyrite, since genuine Marcasite often crumbles into dust and is thus too delicate to be used in jewellery. The composition of iron sulphide and iron pyrite are the same, however they crystallize differently. Iron pyrite is commonly referred to as fool's gold; because throughout history many gold miners believed they had struck it rich when encountering iron pyrite with bright, brassy streaks.
Holistic Properties:
Marcasite brings the energy of the Sun into the physical. It increases physical stamina, stimulates the intellect and helps to transform thought into intelligent action. It is a wonderful stone for use in wealth magic or in trying to manifest needed energies. An excellent shield-stone, Marcasite removes negativity from the aura.