Grey-headed flying-fox (Pteropus poliocephalus) specimen.

---

Size: 3420px × 5109px
Photo credit: © NATURAL HISTORY MUSEUM, LONDON/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: agate, background, band, black, chalcedony, chemistry, colour, cross, crystal, crystalline, crystallized, cut, cut-, earth, gemstone, geology, layer, layered, microcrystalline, mineral, mineralogy, nature, object, pattern, polished, purple, rock, science, section, silica, silicate, single, slice, specimen, stone, strata