The sphere is an excellent shape when using crystals to bring about wholeness, creativity, fertility, healing, warmth, and recharging.  They deeply resonate with the cellular activity of the body.  Consider how the human body is made up of spheres.

Inventory changes, but usually we have a lot of crystal spheres: amethyst spheres, clear quartz spheres, labradorite spheres, moonstone spheres, ocean jasper spheres, rose quartz spheres, serpentine spheres, etc.