Sapphires make you charming, will detoxify you, and will help your hearing. And that is probably why it helps to clarify thinking. Topaz is the Personal Power Stone. It helps promote self-confidence. Turquoise, since ancient times and across many cultures, is a stone of wisdom and healing.
Zircon eases depression and insomnia and is an excellent detoxifier.
Natural zircons are the best but man made stones will do in a pinch. In addition, Copper is a good healing metal and is considered excellent for use with arthritis. Gold warms and attracts prosperity. Silver cleanses and helps to release negativity. There's probably 500 different ways to clean your stones.