Sphalerite, galena and calcite natural crystals
Weight 890 gr
| CHARACTERISTICS | |
| Weight | 890 gr |
| Size | 135x80x60 mm |
| Reference | 220807679 |
| Mineral | mineral Sphalerite |
| Mineral 2 | mineral species Galena |
| Mineral 3 | mineral Calcite |
| Category | Rocks and minerals |
| Group | Crystallization |
| Country |
 Bulgaria
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Contractual photos showing the object you will receive when ordering. the photos were taken in order to obtain the most faithful possible rendering of the object.
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| Formula ZnS] SPHALERITE | |||
| Zn | Zinc | Poor metal | 64.06% |
| S | Sulfur | Other no metal | 33.06% |
| Fe | Iron | Transition metal | 2.88% |
| 100% | |||
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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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| Formula PbS] GALENA | |||
| Pb | Lead | Poor metal | 86.6% |
| S | Sulfur | Other no metal | 13.4% |
| 100% | |||
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Galena is a mineral of the sulfide class, with a chemical formula PbS. It is known for its high density, metallic luster and gray color and usually forms cubic or octahedral crystals, but can also occur in massive or grained form. Galena is an important source of silver, giving it great economic value. It is commonly found in hydrothermal veins and sedimentary deposits. Due to its Pb content, handling of galena must be done with care to avoid any toxic exposure.
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| Formula CaCO3] CALCITE | |||
| O | Oxygen | Other no metal | 47.96% |
| Ca | Calcium | Alkaline earth metal | 40.04% |
| C | Carbon | Other no metal | 12% |
| 100% | |||
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Calcite is a mineral composed of calcium carbonate. It is one of the most abundant and widespread minerals on Earth. Its formation is mainly of biochemical origin, resulting from the accumulation of shells and skeletons of marine organisms. Calcite occurs in a wide variety of crystalline forms, ranging from transparent and colorless crystals to massive and colored aggregates.
Calcite has a relatively low density and a perfect cleavage in three directions, which facilitates its fragmentation into rhombohedrons. Calcite is easily recognized by its effervescence on contact with a dilute acid, releasing carbon dioxide. Calcite is often birefringent, that is to say it splits the light that passes through it, creating a double image effect.
Calcite is an essential constituent of carbonate sedimentary rocks such as limestones and marls. It is involved in the formation of caves and karsts, by dissolution in acidic waters. Calcite is used in many industries: construction, agriculture, metallurgy and the manufacture of chemicals.
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Shipping time
Your orders are usually shipped the day of the order and at the latest after 2 working days.
Delivery delay
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.
Returns and Refund
Our refund and return policy lasts 14 days. You can read the details on the "return and delivery" page.
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