This natural grade A black obsidian is supplied as a tumbled stone approximately 2–3 cm across, in an individual box ready for display in store. Its deep black colour and polished surface give it the understated, glossy appearance characteristic of obsidian. This item is available separately so the natural stone display can be restocked as products are sold. Crystal healing According to tradition, black obsidian is associated with grounding and release. It is traditionally valued for protection, centring and stability. Crystal healing properties are based on tradition and do not replace medical advice. Stone : Black Obsidian Grade : A Shape : Tumbled stone Size : Approximately 2 to 3 cm Packaging : Individual window box Indicated energies: Grounding, Release Presentation: Packaging ready to hang or place in the display stand Product type: Natural tumbled stones Dispatch time: 2-3 business days.