rock

coral

appears to be water worn limestone

sorry just a rock

need a picture of the sides. Could be petrified wood, could be just rock layers.

man made objects are not fossils

even if it was shaped, man made objects are not fossils

Bone with what appears to be cut marks on the sides. Probably modern having been butchered with a knife.

looks like a piece of quartz, not a fossil

Looks like basalt

Teeth with a few exceptions have enamel just like your teeth.

You are correct, this is a rock

Same rock is correct

specific epithet consists only of the species name and does not include the genus. It is in the family Carcharhinidae. At 1 cm it is kinda small to be G. cuvier which crops up in the late Miocene. I would call it G. aduncus.

Need to see it from another angle. The object on top may or may not be a fossil. It is not a head if that is what your are thinking.

Duplicate

Carcharhinus tooth, not a lemon

What I look for first is symmetry and repeating texture. Look at images of parts of living things. Bones and teeth have a natural symmetry. Rocks do not. They are usually irregular in shape. Shells and things like coral have repeating textures. Soft tissue has a one in a billion chance of fossilizing. Take a steak out of your freezer and…[Read more]

Definitely a molar of some sort, however it is modern and not a fossil.

water erosion can sculpt rocks into unusual shapes.