![](http://www.alamy.com/thumbs/6/82254F2D-734B-46D8-B3FB-D1E7B1E92B3E/2EX25GX.jpg)
a large sample of stilbite with calcium and pyrite
Size: 4288px × 2848px
Photo credit: © WireStock / Alamy / Afripics
License: Royalty Free
Model Released: No
Keywords: agate, apophyllite, chalcedony, conglomerates, copper, crystal, crystals, desmin, gem, gemstone, geological, geology, jasper, jewel, jewelery, jewelry, manufacturing, mineral, mineralogy, natural, nature, ore, precious, quartz, rock, science, sectility, semiprecious, silicate, smokey, specimen, stalactite, stilbite, stone, uncut, unpolished, valuable