An excellent blood cleanser (good for the direct crystal water method) and powerful healer, as wellas being a banishing stone! It does give audible sounds when handled.
Use it to improve intuition, creativity, protection, dreams, courage& being in the NOW.
Grounds the Heart Chakra energy & boosts the immune system - esp the lymphatic system
Blood, Heal, Protect.
Smaller crystals (tumbled/raw) can be used for meditation, gridding (home/body), mojo bags, jewellery, making elixirs, divination work.
Larger crystals uses: meditation (depending on the size ;) ), setting up a specific area in your home/garden to draw a specific energy, gridding a room or your whole home, you can even bury large crystals in your garden to generate a particular energetic field!
Pendulums for divination work - either specific to the energy of the crystal, or use a crystal pendulum which resonates with you :)