Geode containing stalactitic growths of chalcedony, from Chihuahua, Mexico. Chalcedony is the micro-crystalline variety of quartz.

---

Size: 4782px × 4722px
Photo credit: © NATURAL HISTORY MUSEUM, LONDON/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: artwork, biological, biology, book, botanical, botany, colden, flora, illustration, jane, leaf, nature, nov-eboracensis, outline, page, plant, print