anthracite coal obsidian

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  • What is the difference between anthracite and thermal coal ...

    Anthracite is a hard mineral coal, cleaner & hotter burning, lower pollutant contaminants, typically with a shiney surface like flint or obsidian. Bituminous coal is "soft" (literally) in the sense that it will easily leave streaks when drawn against other materials, higher in sulphur and other contaminants that cause pollution if burned without controls.

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  • How to tell the difference between black obsidian and ...

    May 12, 2011 · Both obsidian and onyx are black stones (can be other colors as well) which contain silicon and other impurities. The main difference between obsidian and onyx is how they are formed. Obsidian is formed when molten lava erupts from a volcano and cools quickly upon reaching land or water. As a result, obsidian does not have a crystalline structure.

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  • What is the difference between obsidian and coal?

    Bituminous Coal exists in the geological area known as The Pittsburgh Coal Seam-- an area extending from Western Pennsylvania, Western West ia, Ohio, Kentucky, and Indiana.

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  • Black Tourmaline, Obsidian, or Coal? : rockhounds

    In some shots it even looks like jasper, or maybe you have specimens of jasper and obsidian there. Most coal is soft and lightweight compared to other stones the same size. You should be able to see a strong light shine through an edge or thin part of most obsidian.

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  • Not sure what this black material is? - ROCKS, MINERALS ...

    Oct 09, 2018 · Starting an anthracite coal fire takes time and patience. It is a learning process, as anthracite coal burns entirely different than wood or bituminous coal. To burn Anthracite, wad up ple layers of newspapers or similar type paper (a lot!), place on top of a elevated support base that is open to oxygenation.

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  • Anthracite Coal? - Friendly Metal Detecting Forums

    Sep 26, 2014 · Anthracite Coal? Help To ID My Finds. It does look resinal, that is a courious thing, I lived in a coal mining area, and it doesnt look like burnt coal, when I first started I thought when the md said something was silver, than it was silver, and I found slag or melted beer cans and brought it to the forum, everyone was super nice about it, now I call that shiney metalic slag "WV Silver" or ...

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  • How to Identify Obsidian | Sciencing

    Obsidian is a naturally occurring glass formed as igneous rock. It was originally molten lava but cooled so quickly no crystals formed. The lack of crystalline structure means that obsidian in not a true mineral and causes the fracture surfaces to be extremely sharp.

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  • Anthracite - Official ATLAS Wiki

    Anthracite is a resource under the generic Coal type of resources. All the non-generic resources of this type are: Anthracite; Graphite; Lignite; Nitre; Peat; Sulfur; The various resources within this type are interchangeable for crafting common items.

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  • Anthracite Coal Characteristics and Applications - The Balance

    Anthracite coal, mined from the planet's oldest geological formations, has spent the longest time underground. The coal has been subjected to the most pressure and heat, making it the most compressed and hardest coal available. Hard coal contains greater potential to produce heat energy than softer, geologically "newer" coal.

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  • Why is coal classified as a sedimentary rock? - Quora

    Anthracite coal looks like this: It is almost completely shiny, and bears a close resemblance to obsidian. It is metamorphic, having metamorphosed from bituminous coal.

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  • Anthracite | mineral | Britannica

    Anthracite. Anthracite, also called hard coal, the most highly metamorphosed form of coal. It contains more fixed carbon (86 percent or greater on a dry, ash-free basis) than any other form of coal and the least amount of volatile matter (14 percent or less on a dry, ash-free basis), and it has calorific values near 35 megajoules per kilogram...

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  • Re: Black Tourmaline, Obsidian, Hematite or Anthracite or ...

    Feb 28, 2019 · In particular, you have anthracite coal, which is denser and has a higher hardness than normal coal. Anthracite has more of a shiny/glossy surface and has a hardness closer to 3 on the Mohs scale, which means that you wouldn't be able to scratch it with a fingernail (hardness around 2.5).

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  • Re: Black Tourmaline, Obsidian, Hematite or Anthracite or ...

    Feb 28, 2019 · As someone who grew up in NE PA, I can clearly see that you have coal. In particular, you have anthracite coal, which is denser and has a higher hardness than normal coal. Anthrac

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  • Coal - Structure and properties of coal | Britannica

    Coal - Coal - Structure and properties of coal: The plant material from which coal is derived is composed of a complex mixture of organic compounds, including cellulose, lignin, fats, waxes, and tannins. As peat formation and coalification proceed, these compounds, which have more or less open structures, are broken down, and new compounds—primarily aromatic (benzenelike) and .

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  • How to tell the difference between black obsidian and ...

    May 12, 2011 · Both obsidian and onyx are black stones (can be other colors as well) which contain silicon and other impurities. The main difference between obsidian and onyx is how they are formed. Obsidian is formed when molten lava erupts from a volcano and cools quickly upon reaching land or water. As a result, obsidian does not have a crystalline structure.

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  • Anthracite Coal | Inspirit Crystals

    Anthracite Coal. Supports the healing of body tissues. Historically carried by thieves to avoid detection.

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  • Anthracite Coal Characteristics and Applications - The Balance

    Anthracite that is pulverized before burning creates more particulate matter. Inferior coal rejected from anthracite mines is called culm. This has less than half the heat value of mined anthracite and higher ash and moisture content. It is used most often in fluidized bed combustion (FBC) boilers.

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  • Anthracite: Mineral information, data and localities.

    A coal with greater than 90% carbon content dry ash free and less than 14% volatiles. This section is currently hidden.

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  • Station A - Macomb Science Olympiad

    This specimen is: A. Ore of lead B. Ore of iron C. Ore of silver D. Pure lead 22. The fracture of this specimen is: A. Perfect B. Conchoidal C. Uneven D. Splintery 23. The luster of this specimen is: A. Vitreous B. Metallic C. Sub-metallic D. Non-metallic 24.

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  • Chapter 4 Rocks Flashcards | Quizlet

    Chapter 4 Rocks. Magma rises to the surface and cools, making igneous rock / the igneous rock is weathered and eroded, breaking it down/ sediments are deposited, creating sedimentary rocks / sedimentary rock piles up and gets pushed deeper, increasing temperature and pressure / changes to metamorphic rock / if pushed deeper it remelts and becomes magma again.

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  • Anthracite: Mineral information, data and localities.

    A coal with greater than 90% carbon content dry ash free and less than 14% volatiles.

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  • Anthracite - Wikipedia

    • How can I tell if this is Obsidian vs Coal? Found in South ...

      I have anthracite coal that has been sculpted into figures and polished in my dad's collection. (He undoubtedly traded for them at some rock show.) So coal can be hard enough to polish. But coal and obsidian are completely different other than both being black. Get a piece of colored glass to compare. Obsidian isn't a lot different.

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    • How can you tell apart Anthracite coal from obsidian ...

      Dec 31, 2011 · Answers. Anthracite differs from ordinary bituminous coal by its greater hardness, its higher relative density of 1.3–1.4, and lustre, which is often semi-metallic with a mildly brown reflection. It contains a high percentage of fixed carbon and a low percentage of volatile matter. It is also free from included soft or fibrous notches...

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      • Obsidian - Official ATLAS Wiki

        Obsidian is a resource under the generic Flint type of resources. All the non-generic resources of this type are: Agate; Basalt; Chalcedony; Chert; Obsidian; Radiolarite; The various resources within this type are interchangeable for crafting common items.

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      • Trans-D Digital: Obsidian Glass (& a "moon rock") (?)

        Jul 01, 2013 · In reality, Connecticut did have volcanic activity in the very long past, but, although it's possible to still find basalt, obsidian (apparently) has a shorter shelf life. Oddly enough, I noticed a few people in web forums who wondered if they found obsidian in Connecticut in the past 2 years, but, the verdict is that what they found is probably anthracite coal or slag.

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      • Coal will not light... - Solid Fuels: Coal, Coke, Charcoal ...

        May 09, 2017 · I use rice coal from Tractor Supply Co, which is anthracite about the size of small green peas. I've tried the nut coal, but as you say, it's hard to light and keep lit. I suspect that my better luck with the rice coal is on account of its much higher surface-to-mass ratio, which means more of it .

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      • Why is coal classified as a sedimentary rock? - Quora

        Anthracite coal looks like this: It is almost completely shiny, and bears a close resemblance to obsidian. It is metamorphic, having metamorphosed from bituminous coal.

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      • Commercial and Industrial Usage - Reading Anthracite Coal

        Anthracite coal is inherently a high carbon / high BTU quality energy source. In the metal's smelting and fabrication industries, anthracite is commonly used as a reduction agent for various applications such as briquetting charcoal, iron ore pellets and other uses. Metallurgical Industries. Chemical Industries.

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      • Anthracite dials - Page 2useek

        Anthracite being a specific type of coal. Edit: Hmm, I could have been mistaken about this; a search of the Nomos website doesn't reveal any direct mention of Anthracite other than as a dial color. I could have sworn that it used to be there.

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