Skip to comments.Researchers: We may have found a fabled sunstone (Update)
Posted on 03/08/2013 11:05:59 AM PST by Red Badger
click here to read article
This photo taken in Alderney, one of the Channel Islands, dated June 2012 and released on Friday March 8, 2013 by scientist Guy Ropars shows the Alderney Crystal, a piece of calcite. Researchers say the rough, whitish crystal recovered from the wreckage of 16th century English warship may be a sunstone, a special kind of mineral believed by some to have helped medieval seafarers navigate the high seas. (AP Photo/Guy Ropars)
Release the Kraken!!!
A natural beam splitter?
“Le Floch noted that one Icelandic legendthe Saga of St. Olafappears to refer to such a crystal when it says that Olaf used a “sunstone” to verify the position of the sun on a snowy day.”
I hope that all this speculation regarding sunstones isnt due to a single reference in some guy’s journal. If thats the case sunstones have about the same credibility as bigfoot. It would also reinforce my suspicion that archaeologists have far too much time on their hands.
Many stone have birefringence but I was taught Iolite (Cordierite) was use as “sunstones” by Vikings. They were used in pairs as crossed polarloid filters to produce a dark field similar to welding goggles becuase of the the gemstone’s extreme pleochroism, not birefringence.
I read a sci-fi story once with a female archaeologist digging up an old Viking boat with it's crew and the men came to life. After a few days of driving the men around and having them stay at her apartment and humorous interactions and experiences, she asked why they weren't more dazzled at the baffling technology that they were seeing for the first time, one of the Vikings simply stated that, "it was no matter, we had magic in our time also".
Came looking for nearly free and limitless energy. This thread is a Total Heinlein Fail....
Can the suns position in the sky not be estimated by the time of day? Therefore an hour glass could track the Sun from daylight to dark? As long as East and West can be defined?
Who pays for archeologists? Why you do. Most of them are supported by taxes in one form or another. The reason they have too much time on their hands is that they don't have to produce a competitive product to get paid. Sunstone BS doesn't have to be marketable to get the originator paid.
Yes. It's sometimes called "Iceland Spar". Tourist traps and novelty shops of the sort that sell or used to sell various mineral samples commonly sell small pieces of it.
It splits refracts vertically and horizontally polarized light differently, producing a split image. A good sample will be quite clear. Centuries of immersion in seawater would not be good for it.
Ahhh ... that's the big problem, isn't it? Defining longitude is not easy. The development of precise, portable chronometers was driven by the need for such devices to determine longitude.
“The reason they have too much time on their hands is that they don’t have to produce a competitive product to get paid.”
That’s not entirely true. They are supported by grants which are competitively awarded against the proposals of others. My problem with archaeologists is that almost all the time the results of their studies are useless. Did a certain dinosaur have feathers, did the vikings use a sunstone? What sort of wood did some extinct indian tribe use to make a spear? Who gives a Cr@p except that it satisfys someones idle curiosity. It has no practical value, and most of the time the conclusions are based on guesswork and speculation.
“If we confined ourselves solely to pursuits that had calculable practical value, life would be very unpleasant.”
Agreed. I do lots of things that have no practical value, but I use my own money.
And they have dirty minds, too...
“Brooklyn Attitude” = “Never need fear sunburn on scalp.”
That’s the kind of guy arrows were made for.
Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.