Dinosaur Bone Jewelry: It is precious, rare and fascinating demanding gem Ancient Dinosaur Bone is an extraordinary and out-of-the-world addition to your jewelry box. Its appearance largely depends on its composition and the presence of different minerals. Exuding beautiful patterns, colors, and textures, the presence of minerals like chromium and manganese gives it a distinctive appearance. But the term leaves you wondering if the stone is made up of the dinosaur’s bone; after all, it is precious, rare, and must be super expensive.