ROBERTO DE GUGLIEMO / SCIENCE PHOTO LIBRARY ROBERTO DE GUGLIEMO / SCIENCE PHOTO LIBRARY
Brownish-yellow, needle-like crystals of rutile (titanium oxide) embedded in a crystal of colourless quartz (silicon oxide). Quartz containing rutile inclusions is known as "maiden hair" or rutilated quartz. This specimen measures 6 x 4 cm and was found in Ibitiara, Bahia, Brazil.
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