4" Selenite Iceberg Selenite Iceberg Towers are a powerful cleansing tool for your home or office, and will continually purify and protect the energy of your environment. When you place 4 Selenite icebergs in each corner of a room, these crystals act as powerful protective shields, absorbing and dispelling all accumulated negative energies while creating a safe and harmonious space. Each tower has a point at the top, which helps to direct energy when used in crystal grids or meditation practices. Selenite is a powerful healing tool and is great for chakra work, reiki, or simply as a new edition to your crystal collection.