Visby Lenses
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Visby lenses are a collection of lens-shaped manufactured objects made of rock crystal (quartz) found in several Viking graves on the island of Gotland, Sweden, dating from the 11th or 12th century. Some were in silver mounts with filigree, the mounting covering the back of the lens, and were probably used as jewellery; it has been suggested that the lenses the...







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