There are several crystals that are believed to help reduce worry and anxiety. Some of the best crystals for worry include:

1. Amethyst - Known for its calming properties, amethyst is believed to dispel negative emotions and help reduce stress and anxiety.

2. Lepidolite - This crystal is known to contain high levels of lithium, which is commonly used in medication for anxiety disorders. Lepidolite is believed to calm the mind and allow for a sense of inner peace.

3. Rose Quartz - This crystal is known as the stone of unconditional love and is believed to emit a soothing energy that can help reduce anxiety and promote emotional healing.

4. Citrine - Known as the "success" stone, citrine is believed to help reduce worry and promote positive thoughts.

5. Black Tourmaline - This crystal is believed to have grounding and protective properties that can help reduce anxiety and promote a sense of safety and security.