We believe your intuition will guide you in making that decision. However, in most cases tumbled pieces are easier to use in meditation, while raw pieces are extremely beneficial in amplifying the energy of entire rooms. Tumbled pieces often look more vibrant and are more striking, so are perfect for lovers of geological details and to wear as jewellery, keep in your purse etc. Ultimately, everyone responds differently to tumbled and raw pieces, so we encourage you to experiment, spend some time with crystals and find out for yourself.