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Commemorative coins dedicated to the science or inventions are usually made of high rate silver, but there are base metal coins also. Such a serious themes force designers to use restrained decorative elements, making the expressive relief images the only embellishment of the science coins. Some parts of the coins can be colorized or plated, but all the features are mostly traditional. Collectible coins depicting inventions and science usually have beautiful demonstration cases and Certificates of Authenticity. provides the best conditions for deals online and offers free shipping for every order to any country.