Goldstone thumb / worry stone - perfect to pop in your pocket.
 
GOLDSTONE
STONE OF PROTECTION
Composition: SiO2
 
Healing: Improves metabolism and reduces inflammation through increased blood flow. A superb energy conductor, it amplifies thoughts and healing through the wearer. It warms and releases resentment and anger which can build up in the joints. Aids arthritis and rheumatism.
 
This stone is a Silica glass with metallic crystals (commonly copper, but also can include cobalt, manganese or chromium)
Created by Monks 1600 trying to make gold.