All amber is fossilized tree resin. Baltic amber in particular (which is mined near the Baltic Sea) additionally contains a substance called succinic acid. Historically it is believe that when worn on the skin, body heat causes Baltic amber to release an oil containing succinic acid, which if absorbed into the skin, might act like a natural Ibuprofen, blocking pain and reducing inflammation. We do not however recommend using Baltic amber as your sole source of pain relief. Maybe keep a bottle of aspirin around too. All minerals and stones vary in size and shape. You will receive a high quality specimen of the selected item but not the exact one pictured. All minerals, gems, stones and fossils are guaranteed to be top quality; sourced from ethical vendors around the world.