enow.com Web Search

  1. Ads

    related to: spinel crystals
  2. etsy.com has been visited by 1M+ users in the past month

    • Star Sellers

      Highlighting Bestselling Items From

      Some Of Our Exceptional Sellers

    • Home Decor Favorites

      Find New Opportunities To Express

      Yourself, One Room At A Time

    • Black-Owned Shops

      Discover One-of-a-Kind Creations

      From Black Sellers In Our Community

    • Editors' Picks

      Daily Discoveries Curated By

      Our Resident Statement Makers

Search results

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

    en.wikipedia.org/wiki/Spinel

    Polyhedral representation of spinel MgAl 2 O 4. Spinel (/ s p ɪ ˈ n ɛ l, ˈ s p ɪ n əl / [7]) is the magnesium/aluminium member of the larger spinel group of minerals. It has the formula MgAl 2 O 4 in the cubic crystal system. Its name comes from the Latin word spinella, a diminutive form of spine, in reference to its pointed crystals. [5]

  3. Spinel group - Wikipedia

    en.wikipedia.org/wiki/Spinel_group

    Crystal structure of spinel. The space group for a spinel group mineral may be Fd 3 m (the same as for diamond), but in some cases (such as spinel itself, MgAl 2 O 4, beyond 452.6 K [10]) it is actually the tetrahedral F 4 3m. [11] [12] [13] [14]

  4. Ringwoodite - Wikipedia

    en.wikipedia.org/wiki/Ringwoodite

    Ringwoodite is polymorphous with forsterite, Mg 2 SiO 4, and has a spinel structure.Spinel group minerals crystallize in the isometric system with an octahedral habit. Olivine is most abundant in the upper mantle, above about 410 km (250 mi); the olivine polymorphs wadsleyite and ringwoodite are thought to dominate the transition zone of the mantle, a zone present from about 410 to 660 km

  5. List of gemstones by species - Wikipedia

    en.wikipedia.org/wiki/List_of_gemstones_by_species

    Metal-coated crystals hyped as rainbow quartz; Lab spinel; Synthetic turquoise; Terbium gallium garnet; Trinitite; Yttrium aluminium garnet; Yttrium iron garnet; Organic

  6. Crystal twinning - Wikipedia

    en.wikipedia.org/wiki/Crystal_twinning

    This is the case for spinel law twinning on <111>: The spinel structure has a 3-fold rotational symmetry on <111> and spinel is commonly twinned by 2-fold rotation on <111>. [1] The boundary between crystal segments is called a composition surface or, if it is planar, a composition plane. The composition plane is often, though not always ...

  7. Ceylonite - Wikipedia

    en.wikipedia.org/wiki/Ceylonite

    Ceylonite, named for the island of Ceylon, is a ferroan spinel with Mg:Fe from 3:1 and 1:1, and little or no ferric iron. Pleonaste is named from the Greek for 'abundant,' for its many crystal forms, and is distinguished chemically by low Mg:Fe ratios of approximately 1:3. It is sometimes used as a gemstone.

  1. Ads

    related to: spinel crystals