69^€

Natural pyrite on base

Weight 315 gr

CHARACTERISTICS
Weight	315 gr
Size	90x65x35 mm
Reference	240813388
Mineral	mineral Pyrite
Mineral 2	mineral Sphalerite
Category	Crystals and geodes
Group	Free crystals
Country	Peru

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Formula FeS₂] PYRITE
S	Sulfur	Other no metal	53.45%
Fe	Iron	Transition metal	46.55%
			100%
Pyrite is a common mineral in the Earth's crust. Its name comes from the Greek "pyr", meaning fire, in reference to the sparks it produces when struck with steel. This property, due to its hardness and chemical composition, made it a material once used to create fire. From a mineralogical point of view, pyrite is distinguished by its characteristic metallic luster and its brass-yellow color, often confused with gold. Its crystallization usually occurs in the cubic system, forming perfect cube-shaped crystals. However, it can also adopt other crystalline forms such as the octahedron or the pentagonal dodecahedron. The formation of pyrite is related to various geological processes. It is found in sedimentary, metamorphic and igneous rocks. It is often associated with other sulfides such as chalcopyrite or sphalerite, as well as iron oxides. The presence of pyrite in a rock may indicate particular formation conditions, such as an environment rich in sulfur and iron.
Formula ZnS] SPHALERITE
Zn	Zinc	Poor metal	64.06%
S	Sulfur	Other no metal	33.06%
Fe	Iron	Transition metal	2.88%
			100%
Sphalerite is a mineral that belongs to the class of sulphides, more precisely, it is a zinc sulphide, with the chemical formula ZnS. It is mainly recognized as the most important source of zinc. Sphalerite typically occurs as cubic, octahedral, or dodecahedral crystals, but can also take the form of granular or compact masses. Its color varies from brown to black, although it can also be yellow, green or colorless. Its hardness on the Mohs scale is 3.5 to 4, which makes it relatively soft. Sphalerite is also notable for its high optical dispersion, greater than that of diamond, which gives rise to remarkable brilliance when cut into a gem.

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