Viking sunstone rhombohedral Icelandic spar crystal bigger 1 pound 2-5 pieces

Viking sunstone rhombohedral Icelandic spar crystal bigger 1 pound 2-5 pieces


End Date: Tuesday Mar-6-2018 12:35:37 PST
Buy It Now for only: $19.99
Buy It Now | Add to watch list

$19.99

View on Ebay


All natural rhombohedral crystals of clear Iceland spar optical calcite.Crystal size runs 2 to 4 inch by 1 to 3 inch deep.Icelandic Spar or calcite crystal,is believed to be the Vikings mineral of choice for their fabled sunstones, mentioned in the 13th-century Viking saga of Saint Olaf when such a stone would have bent light in a helpful way for seafarers.Because of the rhombohedral shape of calcite crystals,they refract or polarize light in such a way to create a double image.This means that if you were to look at someone's face through a clear chunk of Icelandic spar, you would see two faces. But if the crystal is held in just the right position, the double image becomes a single image and you know the crystal is pointing east-west.These refractive powers remain even in low light when it's foggy or cloudy or when twilight has come, helping in navigation even after the sun had dipped below the horizon.European seafarers had not fully figured out magnetic compasses for navigation until the end of 16th century. The researchers say the crystal might have been used on board the Elizabethan ship to help correct for errors with a magnetic compass.In particular, at twilight when the sun is no longer observable being below the horizon, and the stars still not observable, this optical device could provide the mariners with an absolute reference.Recent excavations turned up the first calcite fragment at a Viking settlement,proving some people in the Viking Age were employing Iceland spar crystals.Each buyer will receive 1 pound generally consisting of 2-5 crystals scooped from crystals as pictured.Shipping in the US mainland will be FREE by USPS priority.