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)
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....
“a sunstone, the fabled crystal ....”
The ambiguous meaning (in this context) of “fabled” seems to imply that there is some doubt about the existence of sunstones. The statement is partially accurate, if “fabled” is taken to mean “made famous in fables”. It is completely wrong, if it is supposed to mean “exists only in fables”.
Sunstones do exist — that’s an indisputable fact. There are also accounts of their use by Viking navigators. Now, it seems that these accounts are likely “historical”, and not merely “fables”. The statement should be changed to: “a sunstone, the crystal made famous in historical accounts of Viking navigation”.
Sun Stone Ping