• weariedfae@lemmy.world
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    11 months ago

    I always think sand is worth looking at at least once, lol. Get a hand lens (like $10?) and check it out!

    Also it’s probably pink not because of garnet but because of the oxidized bedrock. I’ve seen a ton of stuff that looked like that on the shores around the Lake Superior and it was usually some form of basalt, rhyolite, or rare sedimentary interbed. You’d probably see a bunch of smaller reddish pinkish sand grains along with darker gray ones and maybe some milky quartz. But IIRC Canadian Shield stuff is pretty diverse and I recall there being some gnarly meta stuff out there so you might find some glittery mica and garnets.

    • Slowy@lemmy.world
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      11 months ago

      Ok I took some mediocre photos of the sand with this cheap digital microscope, it looks very nice. Can you tell anything about it?

      magnifyed pink sand on a glass slide magnifyed pink sand on a glass slide

      • weariedfae@lemmy.world
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        11 months ago

        Awesome photos!

        Whoa you were not kidding about that being pink. Holy cow. I mean…the pink grains could potentially be garnet but I’m a little doubtful and unsteady at saying that for sure. They have conchoidal fracture and a vitreous sheen which could easily be quartz, perhaps stained by something else going on in the area (Mn? > Fe).

        Those blue green grains are fricken neato, I don’t have a good explanation for them and can’t really get a good look from the photos.

        I see a couple of green grains that could be epidote or some other green mineral, and one that looks a little olivine-esque but it’s hard to tell.

        It’s one of those things that you poke and prod and rotate and stare at for a while before giving a broad, hand wavy guess.

        It would probably be helpful to look up the location and the formation to get a better sense of what to expect.

        Either way, those are dope!

    • SomeoneElseMod@feddit.uk
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      11 months ago

      Do you know what the sand from elafonissi beach (Crete) looks like under a microscope? It really does look pinky when you’re there, and I was told it was because of a certain type of seashell that made up the majority of the top sand. I was a kid though, definitely could have been lies.

      • weariedfae@lemmy.world
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        11 months ago

        Never heard of it but sounds nice! Pink sands can happen for a variety of reasons and I’m not sure exactly what is going on in Crete. I collected some pink sand in the Bahamas that I found interesting and long story short, it was manganese stained fossil coral. It sounds like a similar process is happening in Crete with red stained foraminifera tests (tiny shells). Not sure what the red is in the tests in Crete without digging into it as I only did a cursory search but iron oxide and/or manganese aren’t horrible guesses.

        Looks like a cool spot!