The coin was struck from 200g of pure silver in a limited mintage of only 100 pieces worldwide! This factor makes it an excellent collector's coin. The reverse of the coin depicts the novel's main character, psychologist Kris Kelvin, who arrives from Earth on a research station floating above the cytoplasmic ocean that covers the planet Solaris. On the planet's surface, Kelvin will encounter the most diverse creations of the living ocean: multi-storey lacy symmetrics, asymmetrics and mimoids. For the protagonist, contact with Solaris is also a journey into himself (symbolised by the portal visible on the coin): the conscious planet observes Kelvin (this meaning is signalled by the eye inscribed in the gate) and allows him to confront his past, fears and desires. The obverse shows a fragment of a character from Daniel Mroz's 1972 drawing for Stanisław Lem's 'Cyberiad'. The coin is packaged in an elegant wooden box (natural wood, boxes may differ in appearance) with a certificate attesting to its authenticity.