Apache Tear stones are a form of obsidian that are extremely powerful for protection.  They will ground the wearer and guard them against negativity.  These stones actually absorb the negativity and clear it from your aura.  Apache Tear stones are also very powerful healing tools.  They strengthen the blood and give the immune system a boost. These stones are also great for people who are suffering from grief as they will enable the person holding them to process things in a calm manner.