Unknown Horn Coral

Unknown horn coral with some beekite on the outside and looks like it has trails cut into it. Maybe some snails got to it. This coral was found in Louisville, Kentucky and is probably Devonian period.

It might be 2 cm diameter and 3 cm long.

Middle Devonian Coral: Hexagonaria

Here is a Hexagonaria coral from Devonian period. It was found in Louisville, Kentucky.

Blue Fossils of Lake Cumberland Kentucky

The fossils of Lake Cumberland, Kentucky that have a blue color. Three of these pictures have blue crinoid stem pieces and the fourth is part of blue brachiopod shell.

I need to find a source to describe maybe what species these are and why they are this blue color.