SKU: 82621339913

Pyrolusite Specimen #92

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Description

Pyrolusite Specimen #92Pyrolusite Specimen #92 Pyrolusite is a mineral consisting essentially of manganese dioxide (MnO2) and is important as an ore of manganese. It is a black, amorphous appearing mineral, often with a granular, fibrous, or columnar structure, sometimes forming reniform crusts. It has a metallic luster, a black or bluish black streak, and readily soils the fingers. The specific gravity is about 4. 8. Its name is from the Greek for fire and to wash, in

  • Pyrolusite Specimen #92 
  • Pyrolusite is a mineral consisting essentially of manganese dioxide (MnO2) and is important as an ore of manganese. It is a black, amorphous appearing mineral, often with a granular, fibrous, or columnar structure, sometimes forming reniform crusts. It has a metallic luster, a black or bluish-black streak, and readily soils the fingers. The specific gravity is about 4.8. Its name is from the Greek for fire and to wash, in reference to its use as a way to remove tints from glass.
  • Natural Pyrolusite has been used in batteries, but high-quality batteries require synthetic products. Pyrolusite is also used to prepare disinfectants (permanganates) and for decolorizing glass. When mixed with molten glass it oxidizes the ferrous iron to ferric iron, and so discharges the green and brown tints (making it classically useful to glassmakers as a decolorizer). As a coloring material, it is used in calico printing and dyeing; for imparting violet, amber, and black colors to glass, pottery, and bricks; and in the manufacture of green and violet paints.
  • Measures approx. 3" x 3" x 2 1/2"
  • Some of the most famous early cave paintings in Europe were executed by means of manganese dioxide. Blocks of pyrolusite are found often at Neanderthal sites. It may have been kept as a pigment for cave paintings, but it has also been suggested that it was powdered and mixed with tinder fungus for lighting fires.[9] Manganese dioxide, in the form of umber, was one of the earliest natural substances used by human ancestors. It was used as a pigment at least from the middle paleolithic. It may have been also used by the Neanderthals in fire-making.[10]
  • Origin the San Antonio Mine, Santa Eulalia Mining District, Chihuahua, Mexico
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    SKU: 82621339913

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    Richard Borrelli
    Grantham, US
    ★★★★★ 4
    Bathroom shelf
    Color: Rustic Brown
    Shelf will do the job where you have limited space. I do not like the waal anchors. They will leave a hole in the wall you might be able to crawl through.
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    Reviewed in the United States on December 26, 2025
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    Lisa Christman
    Belleville, US
    ★★★★★ 5
    ⭐️⭐️⭐️⭐️⭐️ Sturdy & Stylish!
    Color: White
    These floating shelves are perfect! The wood looks rustic and beautiful, the guardrail keeps items secure, and installation was quick and easy. They’re sturdy, functional, and add the perfect farmhouse touch to my bathroom. Highly recommend!
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    Reviewed in the United States on October 4, 2025
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    Sullie
    Draper, US
    ★★★★★ 5
    Great little product
    These are nice. They look really good. Nice metal accents with real wood. These are great. They went together pretty easily too. Anyone could do it. The only complaint I had about these is that I had to predrill the holes because they had not gone deep enough at the factory. They had small dimples where the screws were supposed to go. I had to make them actual holes with my drill. Not too bad though. Other than that they are awesome. You could even lightly sand and paint these to be any color you wanted. The metal brackets would pop right out and could be easily reinstalled after the paint dried. I like them a lot. They might be a bit smaller than I had imagined but they are as advertised. If you line up 3 rolls of TP that’s about exactly how big they are. Hope that helps. Take care.
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    Reviewed in the United States on February 27, 2024
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    David monn
    Fort Morgan, US
    ★★★★★ 5
    Well built
    Color: Rustic Brown
    Very nice shelving. We remodeled our bathroom and they fit perfect behind toilet
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    Reviewed in the United States on May 14, 2026
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    XXBrownXX
    Cuba, US
    ★★★★★ 3
    Damaged Product
    Color: White
    Item has some parts of the board being damaged. The quality of the wood is not good. Very disappointed.
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    Reviewed in the United States on February 15, 2026

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