Blue chalcedony
Rough pebble of chalcedony (microcrystalline quartz)
Size: 4272px × 2848px
Location: Estonia
Photo credit: © Siim Sepp / Alamy / Afripics
License: Royalty Free
Model Released: No
Keywords: blue, chalcedony, chert, conchoidal, flint, microcrystalline, mineral, quartz, silicate
