This is how to build spheres in MineCraft: Thought some builders might find this helpful :) - Minecraft | Minecraft dome, Minecraft circles, Minecraft designs
Underwater dome design : r/Minecraft
How to Make a Glass Dome on Minecraft : 6 Steps - Instructables
Plotz - Minecraft Sphere Generator
Minecraft: How to make a circle in Minecraft | How to make a Ball in Minecraft | Minecraft Tutorial - YouTube