Quartz crystal/agate cylinder / There are two main groups of quartz: chert and chalcedony. Agates form in cavities left by gas bubbles in cooling lava. Silica-rich groundwater builds layers of crystals on the cavity walls.
Opal Butte crystal with contra luz color with spectacular visual effect. It looks like an underwater view of the ocean floor as light shines through it. There's a surreal quality about the gemstone that looks like a pocket-sized aquarium.
Clusters of sparkling minerals make a beautiful set of magnets to scatter throughout the home. Each set includes 8 magnets; one each of: amethyst, pyrite, quartz, geode, and four colors of agate slices.