33^€

Sphalerite and galena from Bulgaria

Weight 165 gr

CHARACTERISTICS
Weight	165 gr
Size	60x40x30 mm
Reference	220807646
Mineral	mineral species Galena
Mineral 2	mineral Sphalerite
Category	Rocks and minerals
Group	Crystallization
Country	Bulgaria

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Formula PbS] GALENA
Pb	Lead	Poor metal	86.59%
S	Sulfur	Other no metal	13.39%
			99.99%
Galena is a mineral composed of a sulphide of lead, often used as the main component for the manufacture of shotgun pellets. It is a very compact, very shiny and opaque mineral that has a silvery gray color. Galena is very ductile and forms in a wide range of crystal geometries including cubic, octahedral, and rhombohedral shapes. It is mainly formed from metal sulphides such as galena, sphalerite and chalcopyrite. Its chemical composition is PbS with traces of arsenic, bismuth and zinc. Galena is mainly used to produce lead. It is also used in the manufacture of soldering materials, batteries, lubricants and paints. Galena is also used as a catalyst for lead chloride, which is then used for wastewater treatment. In addition, it is used in metallurgy to produce metal alloys.
Formula ZnS] SPHALERITE
Zn	Zinc	Poor metal	64.05%
S	Sulfur	Other no metal	33.06%
Fe	Iron	Transition metal	2.88%
			99.99%
Sphalerite is a mineral composed of sulfide zinc. It is a natural compound, very common and one of the most important sources of zinc-sulfur. Sphalerite exhibits colors ranging from yellow to brown and red to black. It can also be transparent or opaque. It is usually opaque and has a glassy transparency in some varieties. It has a hardness of 3.5 to 4 on the Mohs scale and its chemical composition is ZnS (Zinc Sulfide). Sphalerite is mainly formed in sedimentary or hydrothermal rocks containing sulfur and zinc, at relatively low temperatures. Sphalerite is widely used as a collectible mineral and as a semi-precious stone used in jewelry. It is also used in light industry as a raw material for reflective glass, for catalysis and other industrial uses. It is also used as an abundant and inexpensive source of zinc, which is an essential metal for many organisms. Zinc is an essential mineral for life and is used in many industrial applications.

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