enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Native metal - Wikipedia

    en.wikipedia.org/wiki/Native_metal

    A native metal is any metal that is found pure in its metallic form in nature. [1] [2] Metals that can be found as native deposits singly or in alloys include ...

  3. Native element mineral - Wikipedia

    en.wikipedia.org/wiki/Native_element_mineral

    Native copper Native gold Native silver Native sulfur Diamond (native carbon) Native element minerals are those elements that occur in nature in uncombined form with a distinct mineral structure. The elemental class includes metals, intermetallic compounds, alloys, metalloids, and nonmetals.

  4. Native state (metallurgy) - Wikipedia

    en.wikipedia.org/wiki/Native_state_(metallurgy)

    Metals in their native state are those found in nature as free elements (chemically uncombined). They are usually attached to or mixed with varying amounts of undesired material , and require only physical separation to produce usable metal. Most metallic ores in the Earth's crust require chemical processing to produce metal.

  5. List of U.S. state minerals, rocks, stones and gemstones

    en.wikipedia.org/wiki/List_of_U.S._state...

    The thunderegg, a nodule-like geological structure, similar to a geode, that is formed within a rhyolitic lava flow, were said by the Native Americans of Warm Springs to have been created by thunder spirits that lived in the craters of Mount Hood and Mount Jefferson. [83] [84]

  6. Metals of antiquity - Wikipedia

    en.wikipedia.org/wiki/Metals_of_antiquity

    While all the metals of antiquity but lead occur natively, only gold and silver are commonly found as the native metal. Gold and silver occur frequently in their native form; Mercury compounds are reduced to elemental mercury simply by low-temperature heating (500 °C).

  7. Category:Native element minerals - Wikipedia

    en.wikipedia.org/wiki/Category:Native_element...

    Native element minerals are those elements that occur in nature in uncombined form with a distinct mineral structure. The elemental class includes metals and intermetallic elements, semi-metals and non-metals. This group also includes natural alloys, phosphides, silicides, nitrides and carbides.

  8. Metallurgy in pre-Columbian America - Wikipedia

    en.wikipedia.org/wiki/Metallurgy_in_pre...

    Sican tumi, or ceremonial knife, Peru, 850–1500 CE. Metallurgy in pre-Columbian America is the extraction, purification and alloying of metals and metal crafting by Indigenous peoples of the Americas prior to European contact in the late 15th century.

  9. Platinum group - Wikipedia

    en.wikipedia.org/wiki/Platinum_group

    Platinum in a native state, often accompanied by small amounts of other platinum metals, is found in alluvial and placer deposits in Colombia, Ontario, the Ural Mountains, and in certain western American states. Platinum is also produced commercially as a by-product of nickel ore processing. The huge quantities of nickel ore processed makes up ...