A short description of Mastodons and their ivory
Mastodons are an extinct mammal that looked much like our modern day elephant. Another similar extinct mammal is the Woolly Mammoth - the two are often confused although they are two entirely different species. In the Yukon and Alaska mastodons are thought to have died out around 30,000 years ago. Mammoths, 12,000 years ago. The ivory (tusks) and bones of both of these animals have been frozen in the permafrost for thousands of years, thus preserving them almost as new. The ivory I have is from two different mastodons so is about 30,000 years old.
One of the tusks I have is white and is suitable only for jewelry. The other is brown with streaks of blue on the outside. This is caused by mineralization while in the ground. Brown ivory is rare and blue ivory is very rare.
Here is an excerpt from Britannica.com:
Mastodon, any of several extinct elephantine mammals (family Mastodontidae, genus Mastodon [also called Mammut]) that first appeared in the early Miocene and continued in various forms through the Pleistocene Epoch (from 2.6 million to 11,700 years ago). In North America, mastodons probably persisted into post-Pleistocene time and were thus contemporaneous with historic North American Indian groups. Mastodons had a worldwide distribution; their remains are quite common and are often very well preserved.