Opal is an hydrated variety of amorphous silica. Sample with dendritic pyrolusite.
Size: 5292px × 3424px
Photo credit: © José María Barres Manuel / Alamy / Afripics
License: Royalty Free
Model Released: No
Keywords: amorphous, close-, dendritic, gemstone, geology, horizontal, hydrated, mineralogy, mineraloid, opal, opalo, oxide, pyrolusite, sample, silica