Times like these make me want to spend even more time around rocks. Rocks are Good People, Man! I can always count on them to just keep on keeping on. These were seen just 5 days ago in Tucson, Gem and Mineral Show, a venue off Oracle. One gets jaded over the years to seeing thousands of vugs and geodes of crystals. But still a bit of my heart skips to see them. #Geology #Tucson #GemShow #Crystals
crystals
Crystal of Iceland Spar (1878), from The Principles of Light and Color.
Source: Smithsonian Libraries and Archives
https://pdimagearchive.org/images/e417eda7-14bb-452b-8d02-664cbf645a46
#iceland #ether #color #crystals #psychicphenomena #colortheory #bookillustration #photomechanical #art #publicdomain
