![](http://www.alamy.com/thumbs/6/695F8DF4-657D-42F2-9D74-6686B91C2261/B8F3TR.jpg)
Gypsum crystal twin.
Size: 5200px × 3453px
Location: USA
Photo credit: © GreenSc / Alamy / Afripics
License: Royalty Free
Model Released: No
Keywords: calcium, caso4·2h2o, clear, close-, closeup, collection, crystals, evaporite, form, geology, gypsum, mineral, mineralogy, nature, perfect, science, selenite, specimen, sulfate, transparent, twin, twinning