Rare 30,000-year-old BLUE mammoth tusk found in Alaska is up for auction that could sell for $70,000

A stunning blue woolly mammoth tusk discovered in Alaska is set for auction Friday with an estimated sell price of $70,000. The rare coloring was a result of a mineral that replaced broke bits of the tusk. https://www.dailymail.co.uk/sciencetech/article-9377277/Rare-30-000-year-old-BLUE-mammoth-tusk-Alaska-auction-sell-70-000.html?ns_mchannel=rss&ns_campaign=1490&ito=1490