Crystal trees radiate energy into the area around them. This makes them perfect for Feng Shui, home décor, manifestation, and good energy throughout the home/room/office.
Citrine is the premier crystal for the Sacral chakra. It is a happy stone and brings inner joy and optimism. You could almost say it brings one's inner child out as it releases burdening everyday issues and responsibilities that weigh us down. Citrine also aids creativity and willpower.