JURASSIC Red Dinosaur Bone Inlaid Tungsten Carbide Beveled Edged Ring - 4mm and 8mm With an inlay of authentic mineralized fossil of a reddish tone that has been carefully cut and polished and set into the amazing Tungsten Carbide ring by Thorsten this is a wedding band perhaps some 200 million years in the making. A remarkable fossil find for any period. Period. Engraving available! See Pictures for Details. Does Not Delay Order. Includes Thorsten Lifetime and Lifetime Sizing Warranty (excluding re-engraving). Available in 4mm and 8mm widths for couples who want a matching set. Tungsten Carbide—the newest and strongest metal for jewelry that does not scratch easily. Note that the fossil inlay can be scratched. Comfort Fit – domed interior band slides over the knuckle easier with less friction.