Fossil dinosaur bone pieces in jars

Small pieces of real fossilized dinosaur bone from the Cretaceous period in the US (145 million years ago to 66 million years ago, when the non-avian dinosaurs went extinct).  The tall bottle with the cork is sealed but all the other containers will come to you with the lids held on by a removable elastic band so that you can tip out the contents and look at them! The photo is representative; actual specimens and their number will vary slightly. Well known North American dinosaurs from the Cretaceous include Deinonychus, Utahraptor, Ankylosaurus, Hadrosaurus, Styracosaurus, Triceratops, Tyrannosaurus and Troodon. An explanation of how we know that this is fossilized bone: If you have ever looked at the inside of a bone you will have noticed that there is a structure to it, varying in different parts of a bone. There is the dense outer wall of bone, which still has some porosity to it for blood vessels and also may show some directionality. There is also "spongy bone", full of porositie