Divine crystals are six-sided (tall /'vertical sides') - which makes them look hexagonal from above, if looking straight down onto the point. Uses revolves around channeling divine energies like a cleric does, or storing spirit power, or even souls as per the dark arts. Channellers are distinguishable by the front face being a seven-sided face with the back face being a triangle: 7 & 3. The numbers 7 and 3 are significant in many ancient ways. 3 - the Trinity, represents Unity, Order, Harmony and Perfection. The Triangle is such a sacred ancient Universal symbol of unity, strength, balance, communication and wholeness. More personally, 3 represents personal power and self-knowledge, and the expression and manifestation of that on Middle-Earth. A pyramid is a triangle from the side - and has always been about bringing down light from above onto the Earth plane - and 'splaying it’ out.
This type crystals cleanse, clarify, lighten and amplify energy. In other words, these are items well suited for infusing and draining energy of various sources.