Apparently this is caused by a wet iron-rich site. The phosphate in bones/teeth/tusks combines with iron to form vivianite. Some varieties of the mineral turn blue when exposed to light. So the fossil finder watches it turn a shade of deep blue. Cool.
Apparently this is caused by a wet iron-rich site. The phosphate in bones/teeth/tusks combines with iron to form vivianite. Some varieties of the mineral turn blue when exposed to light. So the fossil finder watches it turn a shade of deep blue. Cool.
I love the deep, rich green these possess. Fascinating stuff! It’s been very interesting to learn about 🙂