Rocks

Radiolarites

Metamorphic rock with a hard, compact texture, which may contain dead organic matter and lead. This specimen is 4 cm long. Photograph by Peter B Tzannes, 2004

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Oxi

This incredible beach stone has veins that spell the Greek word ‘oxi’, meaning ‘no.’ Imagine our amazement when we came upon it on the beach near Agia Pelagia!

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Euclid VI.2

Beach stone illustrating Euclidean proposition VI.2. Photograph by Peter B Tzannes, 2004

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Euclid I.27

Beach stone illustrating the Euclidean diagram for Book One, Proposition 27. Photograph by Peter B Tzannes, 2004

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Seventy

Beach stone with the number 70 inlaid in calcite. Photograph by Peter B Tzannes, 2004

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