The Geode comes as many crystals, some being, Quartz, Amethyst, and Citrine. This is what I know of Geodes. They can help you to see the whole picture and also helps with coming to a decision before things get out of hand. It helps one have the ability to shape one's own future. It bridges communications with the Higher Deity and also helps in communications with people that are in the same healing fields.
Size, shape and weight vary per stone.