The Dominican Amber Wildcat uses to make their color changing earplugs is not only 48 million years old and extremely rare, but the material is also fluorescent.
Far from the the sanitized mass produced products which dominate the world market place, these amazing color changing amber earplugs are also related to the roots of body modification, a thousand year old tradition.
The ear plugs range from Dominican blue to green amber, but they aren't solid colors or even pigments, they are a reaction of light particles that occurs due to the density of aromatic molecules trapped in the resin. These hydrocarbons only exist in Dominican Amber. Under different light conditions, special effects are noticeable.
Dominican Amber is totally natural, formed through a natural polymeritzation more than 40 million years ago. Check out pictures 3 and 4 to see how the amber changes color under sun light and uv light.