Made of clear crystal. Hung in windows, crystals can bring chi energy from the outside into dark areas of your home or office. A crystal placed in the south-east, north-west, or center of a room can aid in stimulating prosperity. Only the finest quality lead crystal is used which makes them the most valued type of crystal. Each is made with a hole for hanging in your window or attaching to projects. They make great gifts the sparkle in this crystal a makes it a gorgeous and easy gift or ornament these are priced to sell this crystal prism is gorgeous crystal helps to harness positive flow of chi(energy). It brings live and fresh energy in to a stagnant room. Besides their dramatic beauty, using crystals is one of the most powerful methods for improving the flow of healthy “chi” energy in an environment. When we energize with a crystal, we are energizing our earth luck which is one of the three type of lucks according to feng shui. When crystals are used it brings extra good luck almost anywhere you place them. According to vastu attract more positive energy by hanging in window to attract sun rays to the house. Place 8 crystals at north east to improve education luck. Place 2 crystals at south west to improve the relationship luck. Hang crystal in window to attract auspicious sunrays.