Teeth of the largest land predator that ever lived! The Spinosaur. This Dinosaur could be up to 15 meters long!
Teeth of the largest land predator that ever lived! The Spinosaur. This Dinosaur could be up to 15 meters long!
Obsidian is natural glass made from rapidly cooling lava. It has been used for centuries by all great civilisations.
The mineral aragonite is a polymorph of calcite with its own crystal structure. It has a grounding effect and can occur ...
Fossil fish from Green River Wyoming USA, between 45 and 50 million years old.
Very special fluorite that changes from green to purple under the UV radiation of daylight! A fantastic phenomenon that ...
Very special fluorite that changes from green to purple under the UV radiation of daylight! A fantastic phenomenon that ...
Serpentine, with its green colour reminiscent of a snake, has been popular for centuries for making decorative objects a...
