299^€

Sphalerite, galena and calcite in crystals

Weight 1.55 kg

CHARACTERISTICS
Weight	1550 gr. 1.55 kg
Size	max 19 cm 190x100x70 mm
Reference	220807680
Mineral	mineral Sphalerite
Mineral 2	mineral species Galena
Mineral 3	mineral Calcite
Category	Rocks and minerals
Group	Crystallization
Country	Bulgaria

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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.
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 CaCO₃] CALCITE
O	Oxygen	Other no metal	47.95%
Ca	Calcium	Alkaline earth metal	40.04%
C	Carbon	Other no metal	12%
			100%
Calcite is a common mineral in many sedimentary rocks and metamorphic rocks. It is also present in soils, marine sediments and lakes and saline lakes. It is the main component of limestone. Calcite is a mineral from the carbonate family. It has a hexagonal crystal structure and is transparent to translucent. Its color varies from white to light gray, yellow, orange and even red. It has an average hardness of 3 on the Mohs scale. Calcite is mainly produced by biogenic and chemical processes. When waters move through limestone and interact with carbon dioxide, calcite is formed. It can also be formed by volcanic processes, fault movements or soluble processes. Calcite is widely used in the chemical, food, medicine and building materials industry. One of the main uses of calcite is to produce lime for road surfacing. Calcite is also used for the manufacture of ceramic products. In addition, it is sometimes used in optical systems for its optical properties.

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Once the package is supported by the postal service, delivery times are those announced by the Post (letter followed or Colissimo followed). Parcel shipping from France.

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