Rare Blue Forest Petrified Wood Solid Sterling Silver Ring This Wyoming Petrified Wood was formed from plants living about 50 million years ago . The rock exhibits features not found in fossil wood anywhere else in the world. Blue Forest Petrified Wood is famous for the light blue chalcedony that is often present. It comes from the Eden Valley in Sweetwater County, south west Wyoming. These fossils are Eocene in age and part of the Green River formation. During that time this area was hot, and humid with many large lakes. The unique thing about Blue Forest fossils is the layer of chalcedony that forms mostly on the outside of the fossils. Solid Sterling Silver Artisan Handmade Rare Wyoming Blue Forest Specimen Size: 8.5 Beautiful Minimalistic Sterling Silver Setting Showcases The Rare Specimen. Unique And Beautiful Gemstone Fossil Petrified Crystal Healing Sterling Silver Artisan