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#kyanite — Public Fediverse posts

Live and recent posts from across the Fediverse tagged #kyanite, aggregated by home.social.

  1. Bill Minarik @silicatefondue ·

    And here are color versions of the 32 minerals in placed on the bracket.

    Winner , runner up

    Drawings by Fernando Salvaterra on BlueSky(@salvaterra.bsky.social)

    #mincup25 #kyanite #tugtupite
  2. Mineral Cup & Ore Cup @[email protected] ·

    We have a #MinCup25 champion!!

    Congratulations, #Kyanite!
    mineralcup.org/2025

    After eight years of competing, another few hours to verify votes was nothing, right?

    Amazing first run, #Tugtupite, and better luck next year.

    #mincup25 #kyanite #tugtupite
  3. Bill Minarik @silicatefondue ·

    Repost: Kyanite isn't just a fetching blue mineral that documents the experience of sediments under extreme duress.
    It's an ore: Virginia alone mined 83,000 tonnes in 2023. Kyanite in furnace insulation transforms to mullite when heated, expanding to reduce porosity and shrinkage.

    Virginia Kyanite (photo: J. Wyman) from:
    energy.virginia.gov/geology/Ky

    #mincup25 #kyanite #mullite #virginia #appalachians
  4. Bill Minarik @silicatefondue ·

    This is one of the dykes found near Ayer's Cliff, just SE of Magog, Quebec. It's a set of three dykes, one of which has the deep-derived xenoliths. That one dyke (not photogenic) has weathered much faster, perhaps due to a higher carbonate content.

    #kyanite #mincup25 #quebec #xenolith #grenville #appalachians
  5. Mineral Cup & Ore Cup @[email protected] ·

    #MinCup25 QF3 UPDATED RESULTS:
    #KYANITE win and will continue on to the semi-finals.

    We’re so sorry for the false hope, #Kosmochlor fans, but we caught 3 players stuffing the ballot box in the final hours. Once their excess votes were removed, Kyanite’s lead returned (although you did close the gap a lot!)

    #mincup25 #kyanite #kosmochlor
  6. Bill Minarik @silicatefondue ·

    A photo of a Cretaceous dyke intruding into Appalachian-deformed sedimentary rocks deposited in the lower Paleozoic: Earth history from 110 to almost 500 million years ago.

    But records more of the story: it's part of xenoliths brought to the surface by these dykes that document Grenville crust (1.1 billion years old) at depth.

    See: Trzcienski: Kyanite-garnet-bearing Cambrian rocks and Grenville granulites from the Ayer's Cliff, Quebec... Geology (1989)

    #kyanite #mincup25 #quebec #appalachians
  7. Mineral Cup & Ore Cup @[email protected] ·

    #MinCup25 Quarterfinals 3: It's a showdown between Team Green and Team Blue for #kosmochlor vs #kyanite.

    Vote: mineralcup.org/2025/vote/r3m03
    Results: mineralcup.org/2025/results/r3

    #mincup25 #kosmochlor #kyanite