If there were an award for Most Instagram-Worthy Nail Art Trend, geode nails would definitely be in the running. Rock-like on the outside but colorful and sparkly when cracked open, geodes contain ...

“Many times, it looks like an old rock on the ground. You don’t know until you’ve broken it open. I’ve crunched a lot of ugly, old rocks open,” he said. Some of the shop’s geodes are ...

Geodes, often seen in jewelry and home decor ... to look even more like a split-open rock.

With a single strike, he cracked open the rock. The center was luminous with crystals. “It’s a geode!” Uncle Yaki put it in my hand. I stared at it, and at him, and then back at the rock.