Also known as the Magic Bearer, Merlinite is believed to reveal things for what they truly are by helping remove the perception of illusion. It is a stone of duality because it speaks about the black and white, and the dark and light. Merlinite can attract powerful magic and good luck in one's life.
Ancient monolithic obelisks had their start in Egypt and can be found all over the world. It is believed that they act as a vessel to help release and distribute built up energy from the Earth. Some believe that's where crystals themselves originate. Since many crystals naturally grow in an obelisk shape, it is thought that built up energies within the earth are released as crystals. The same effect is believed to happen with smaller crystal obelisks placed inside a room. If the space in which the obelisk is placed has built up energy, the obelisk will help to release/distribute and transform this energy depending on what type of crystal the obelisk was made from.
In crystal healing, different shapes are believed to radiate and focus energy in different ways. The obelisk does just what you would imagine: it concentrates the energy of the crystal and radiates out from the top. Smaller obelisks can be held like a wand and be used to direct energy to a specific part of the body, room, workspace, or really anywhere you want.