This amazing natural Black Obsidian from Brazil are available in 1kg packs and have approximately 2-6 pieces per 1kg. Please request larger or smaller pieces if you prefer, Aus Crystals will endeavour to accommodate your requirements. Black Obsidian is a powerful cleanser of psychic smog created within your aura, and is a strong psychic protection stone. It has powerful metaphysical properties that will shield you against negativity, and the energy of these stones may stimulate the gift of prophecy. It an excellent crystal to use when you have been doing spiritual or healing work, as it has a strong action to ground you to Earth. This black stone is excellent to assist you to release disharmony that has built up in your day to day life and during work on yourself, including resentment of others, fear and anger.