Goldstone
Goldstone is a type of glass with copper particles added that is made in a low-oxygen reducing atmosphere. The included copper generates a warming pulse which is good for pain relief.
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Fibromyalgia causes pains and tenderness in many areas of the body. By rubbing the warm goldstone across these areas it will help circulation, and when oxygen can get to the blockages, the pain will dissipate.
Try it also on arthritis, pulled muscles and assorted aches and pains.