Break your own geodes! Moroccan Quartz geodes. These have all been graded to have a high probability of being hollow & filled with crystals. There is still a chance that you will crack open your geode to find solid quartz instead of a cavern of crystals, but the fun is still in the opening of the geode & being the first to ever discover whats inside - hollow geode or not. The last photos show examples of what you might find inside.
Extra Small - 3" & under
Small - 3" - 4"
Medium - 4" - 5"
Large - 5" - 6" & 1.5 - 2lbs each
Curious on how to crack open your new geode? I've got a video for that! https://www.instagram.com/tv/CAnVstVJZdO/
**It is also recommended for safety that you wear eye protection when opening your geodes.