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History
Sea Silk, the rarest fabric in the world
Sea silk is made from the fibers of the noble pen shell (Pinna nobilis L.), an endemic species in the Mediterranean. The noble pen shell produces protein-rich secretions from a gland at the base of its foot. When these secretions come into contact with water, they harden into horny filaments known as byssus threads. These threads help anchor the shellfish in the sand or on rocky seabeds. The process of obtaining sea silk begins by cutting the fibers that anchor the pen shell to the seabed, followed by washing, drying, combing, and spinning. The result is a fine textile material, valued since antiquity for its natural color that shifts from brown to gold.
History of artifacts
The oldest piece of this rare textile dates back to the 4th century, and the oldest preserved item is a knitted cap from the 14th century. Sea silk, often referred to as burning sea gold, was rare and almost unknown in the history of textiles. As an extremely valuable material, it was treasured from antiquity through the Middle Ages. Most preserved items, predominantly gloves, were made by knitting. Sea silk is known for several incredible characteristics: high durability, flexibility, aid in treating rheumatism or gout, and protection against heat, cold, and moisture.
For more detailed historical context and additional information, you can refer to the Sea Silk Wikipedia page.