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  2. Pyrite - Wikipedia

    en.wikipedia.org/wiki/Pyrite

    The mineral pyrite (/ ˈ p aɪ r aɪ t / PY-ryte), [6] or iron pyrite, also known as fool's gold, is an iron sulfide with the chemical formula Fe S 2 (iron (II) disulfide). Pyrite is the most abundant sulfide mineral .

  3. Pykrete - Wikipedia

    en.wikipedia.org/wiki/Pykrete

    A slab of pykrete Pykrete is made of 14% sawdust and 86% water by mass.. Pykrete (/ ˈ p aɪ k r iː t /, PIE-creet) [1] is a frozen ice composite, [2] originally made of approximately 14% sawdust or some other form of wood pulp (such as paper) and 86% ice by weight (6 to 1 by weight).

  4. Fire striker - Wikipedia

    en.wikipedia.org/wiki/Fire_striker

    Assorted reproduction firesteels typical of Roman to medieval period Late 18th-century firetools and bricks from Brittany. A fire striker is a piece of carbon steel from which sparks are struck by the sharp edge of flint, chert or similar rock.

  5. Acid mine drainage - Wikipedia

    en.wikipedia.org/wiki/Acid_mine_drainage

    In this case, the pyrite has dissolved away yielding a cube shape and residual gold. This break down is the main driver of acid mine drainage. Sub-surface mining often progresses below the water table, so water must be constantly pumped out of the mine in order to prevent flooding. When a mine is abandoned, the pumping ceases, and water floods ...

  6. Fire making - Wikipedia

    en.wikipedia.org/wiki/Fire_making

    Evidence for fire making dates to at least the early Middle Paleolithic, with dozens of Neanderthal hand axes from France exhibiting use-wear traces suggesting these tools were struck with the mineral pyrite to produce sparks around 50,000 years ago. [3] At the Neolithic site of La Draga, researchers have found that fungi were used as tinder.

  7. Pyrite group - Wikipedia

    en.wikipedia.org/wiki/Pyrite_group

    The pyrite group of minerals is a set of cubic crystal system minerals with diploidal structure. Each metallic element is bonded to six "dumbbell" pairs of non-metallic elements and each "dumbbell" pair is bonded to six metal atoms.

  8. Espresso Martini Fudge Is Cocktail Hour Bite-Sized - AOL

    www.aol.com/espresso-martini-fudge-cocktail-hour...

    Dust with espresso powder, top with espresso beans (if using), and cut into squares. You Might Also Like. Insanely Easy Weeknight Dinners To Try This Week. 29 Insanely Delicious Vodka Cocktails.

  9. Tailings - Wikipedia

    en.wikipedia.org/wiki/Tailings

    The effluent from the tailings from the mining of sulfidic minerals has been described as "the largest environmental liability of the mining industry". [4] These tailings contain large amounts of pyrite (FeS 2) and Iron(II) sulfide (FeS), which are rejected from the sought-after ores of copper and nickel, as well as coal.