Spiritually Shaped Crystals
The most Famous examples are perhaps the Pyramids of Ancient Egypt. That shape helps manifest Spiritual Creativity on the Physical Plane.
An Obelisk is a Pyramid sitting on top of a taller square base narrowing towards the top which encourages the upward flow to Spirit.
Wands are used to channel and direct energy for Healing.
Generators are vertical crystals which enhance meditation through awakening the Kundalini Consciousness in the Spine.