Manganese-oxide Dendrites 9e554ba3f1a423412294962f5b0caf27 0 on the Mohs scale

0 on the Mohs scale of hardness

The Neolithic era varies in time span depending on geographic location

Tyrannosaurus-rex had the strongest bite force of any land animal that has ever lived and it's estimated to have been able to grab up to 500 lb

are an extinct group of arthropods that are related to arachnids and include the largest known arthropods to have ever lived

but their stony replicas

Manganese-oxide Dendrites 9e554ba3f1a423412294962f5b0caf27 0 on the Mohs scaleCommonly mistaken for fossils, Dendrites, (from the Greek word meaning "tree") are actually a mineral (>Manganese oxide and iron hydroxide) formation that occurs when mineral (manganese and iron) rich water finds its way between limestone and other rock layers then deposits those minerals along fissures inside the stone. This Dendrite specimen was found in Jurassic limestone that is ~155 million years old. These minerals are 100% authentic and natural.