Pyrolusite Specimen #92
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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    Emm!
    Louisville, US
    ★★★★★ 5
    A product that will make a difference!
    Color: White, Size: King (Pack of 2)
    These king-size pillows are incredibly comfortable and supportive. They are soft enough to feel luxurious, yet they provide great support for my head and neck throughout the night. The king size is perfect for a larger bed and gives the bed a full, hotel-like appearance. The pillows keep their shape well and fluff up nicely after use. I've been sleeping much better since getting them and would definitely recommend them to anyone looking for quality, comfortable pillows.
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    Reviewed in the United States on June 3, 2026
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    Roman P
    New York, US
    ★★★★★ 5
    A must have♥️❤️
    Color: White, Size: King (Pack of 4)
    These pillows are amazing They’re plush and extremely comfortable. I love them.
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    Reviewed in the United States on June 9, 2026
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    Mimis cake school
    Houston, US
    ★★★★★ 5
    Finally! Comfy pillows for a😴good night sleep
    Color: White, Size: Queen (Pack of 4)
    Just wow!! Looking for new pillows that are comfortable & hold their shape. These are it ! I love anything by utopia. And these pillows did not disappoint. Great value. Feels like a high end pillow. As a side sleeper these are a keeper. Highly recommend. And ill be purchasing more!
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    Reviewed in the United States on May 18, 2026
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    Jennifer Kuhns
    Battle Creek, US
    ★★★★★ 4
    Soft...but fluffy and tall
    Color: White, Size: Standard (Pack of 2)
    I've only had these pillows for about a week. They are a great quality pillow. The cover is soft and seems well made. My only complaint is that they are VERY full pillows. If you're tall with broader shoulders, you'll probably love them. If you're shorter with a smaller frame you will probably feel like your head is too high and your neck at a weird angle (my problem). There seemed to be mixed reviews about softness....I would consider these a nice medium pillow. Soft filling but firm enough that your head doesn't sink to the bed. Definitely NOT a down-like pillow, so if that's what you're looking for, this is not for you.
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    Reviewed in the United States on April 10, 2026
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    Maria Fernanda Rojas Mejia
    Alexandria, US
    ★★★★★ 5
    Soft, fluffy and surprisingly comfortable
    Color: White, Size: Queen (Pack of 2), Color: White, Size: Queen (Pack of 2)
    I really liked these pillows. I tried to show different things in my photos because I wanted people to see the details: the design, how fluffy they are, and how full and thick they actually look. They are so full that the pillowcase even looks tight once you put it on, which I actually loved because they look luxurious and well-filled. At first glance they look very thick and high, but once you lay down they feel soft and fluffy instead of hard. They adjust comfortably and feel very cozy whether you’re sleeping, relaxing, or even reading before bed. I think they offer a really good balance because they feel supportive without being stiff. Of course, pillow preference is very personal—some people like lower pillows and others like higher ones—but for someone who likes fuller pillows that are still soft and comfortable, these are great. They are spacious, cozy, and feel like a very good purchase overall. I honestly don’t have any complaints so far. Definitely happy with them.
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    Reviewed in the United States on May 15, 2026

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