Explore Fossilized Coral, Dinosaur Fossils, and more!

Fossil coral is a natural stone that is formed when ancient coral is gradually replaced with agate. The proper name for this material is agatized coral or agatized fossil coral. The fossilized coral typically appears as small flower-like patterns in the stone.

Agatized Fossil Coral

Fossil coral is a natural stone that is formed when ancient coral is gradually replaced with agate. The proper name for this material is agatized fossil coral.

Petoskey Stones were formed by the fossilization of ancient coral, Hexagonaria.  The coral lived in shallow waters.  Petoskey Stones are found on many beaches of Lake Michigan and Lake Huron, as well as in rock quantities from Traverse City to Alpena.  The honeycomb patterned stone has a hardness from 4 to 5.

Petoskey Stones were formed by the fossilization of ancient coral, Hexagonaria. The coral lived in shallow waters. Petoskey Stones are found on many beaches of Lake Michigan and Lake Huron. Petoskey stones, only found in Michigan.

fossil coral

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Agatized Fossil Coral or Agatized Coral is formed when ancient coral is gradually replaced with agate.The fossilized coral typically appears as small flower-like patterns in the stone.

Fischer stone. These are man made from natural snakeskin agate soaked in a copper bearing solution then placed in contact with Iron. These old fisher stones are pretty scarce now and have become collectors items.

These are man made from natural snakeskin agate soaked in a copper bearing solution then placed in contact with Iron. These old fisher stones are pretty scarce now and have become collectors items.

Ammonite with iridescent nacreous layers, found on joias6.tumblr.com

Ammonite,Sphenodiscus lenticularis, from the Fox Hills Formation, South Dakota.Both sides display intricate suture patterns and an iridescent nacreous layer. This laterally flattened Ammonite is thought to be a fast swimmer.

A Petoskey stone is a rock and a fossil, often pebble-shaped, that is composed of a fossilized coral. Found only in Michigan

A Petoskey stone .is a rock and a fossil, often pebble-shaped, that is composed of a fossilized coral that lived 350 million years ago. The rocks rounded in the surf along the shores of Lake Michigan near Petoskey, Michigan.

Annularia sp. are the leaf whorls of an extinct horsetail. These horsetails (Sphenopsida) were arborescent (tree-like) and grew to a height of 31 feet. Fossil found in Illinois

- the leaf whorls of an extinct horsetail. These horsetails (Sphenopsida) were arborescent (tree-like) and grew to a height of 31 feet. Fossil found in Illinois

A scanning electron microscope picture of a nerve ending. It has been broken open to reveal vesicles (orange and blue) containing chemicals used to pass messages in the nervous system.

frontal-cortex: Scanning electron microscope picture of a nerve ending that has been broken open to reveal the synaptic vesicles beneath the cell membrane. Image by Tina Carvalho. The Cell: An Image Library

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