According to The Crystal Bible by Judy Hall
there are three stones that overlap with treating both anxiety
. Here are some sentences about what it says from the book (because I don't believe in retyping books online):
Calcite treats anxiety by gently soothing the nerves and uplifting anxiety. Blue Calcite is best for anxiety where Black Calcite is best for depression. When treating depression it treats regression and regaining past memories so you can be released from past experiences. It can aid in returning mind body and soul together after past trauma or stress and alleviates depression so it can aid in tough times.
I think that you can get Calcite together to aid in things such as flashbacks/repression of memories/trauma from that description.
Iron Pyrite relieves anxiety and frustration as well as helping aiding self-worth by boosting self-confidence. It helps the genders settle gender role conflicts that can cause pain and despair (for example, men strengthen confidence in masculinity and women overcome inferiority complexes). Emotionally iron pyrite helps treat melancholy and deep despair. It also helps with fatigue which can happen with depression.
Kunzite is helpful in reducing stress-related anxiety and can cause introspection to act upon constructive criticism. It can free emotional debris and alleviate heartache, it's mood-lifting aspect can clear up depression arising from an emotional cause. It is excellent for alleviating panic attacks.
I hope this helped! *hugs* I recommend this book for people I guess because it's informative about crystals and minerals around healing matters.