ETYMOLOGY: The old arabic name for pyrite.

CRYSTAL SYSTEM: Rhombic.

PRINCIPLE OF FORMATION: Primary / tertiary.

CLASS MINERAL: Sulphides

CHEMICAL FORMULA, MINERAL ELEMENTS: FeS2.

HARDNESS: 6 - 6.5 on the Mohs scale.

FIELDS: Britain, France, Germany, Spain (Cantabria, Catalonia, Guipúzcoa), Czech Republic, USA.

MINERALOGY: Formed from low temperature in hydrothermal solutions, is accompanied by galena, sphalerite, quartz, calcite, pyrite or pyrrhotite is dimorphic (which can crystallize in two different systems) of the pyrite. It is altered by hydration and leads to melanterite, it contains approximately 46.6% iron and 53.4% ​​sulfur, is very commonly found in sedimentary rocks such as loam, clay or limestone.

MYTHOLOGY: The marcasite when presented in tabular crystals, sometimes forming aggregates as cockscomb, for this reason in the Middle Ages it was called "The crest pyrite gallo". It was used in 1845 by the Austrian mineralogist van Wilhelm Haidinger (known for his study of the optical properties of minerals). The Marcasite also called white pyrite, due to its paler color. When heating marcasite becomes magnetic.

PROPERTIES: It is said that the marcasite helps those who wish to incorporate spirituality into the functional reality of the everyday world, this stone increases objectivity, increases willpower, mentally marcasite helps memory problems, it exceeds the mental exhaustion, it improves concentration and brings clarity. emotionally dissipate hysteria, and it removes ingrained martyrdom and victim mentality patterns, inducing emotional prosperity.

CHAKRAS: Solar Plexus.

USES: Jewellery, Meditation, collection, ore sulfur for sulfuric acid and vitriol, a hydrated iron sulfate used in paints, as a wood preservatives and disinfectants.