Environment

This stone was considered sacred by members of the most mysterious medieval order - the Knights Templar. It comes as no surprise since the rock may change its colour in a matter of a few minutes.

This rock may occur as below the Earth’s surface as in space, too. For centuries humanity was tricked into thinking it was a precious mineral.

The metal - tungsten, or wolfram, - whose melting point is the planet’s highest, was named after this mineral.

When exposed to air, this stone turns dark; neither it is resistant to moisture attack. Both the downsides did not, however, stop the mineral from turning into a sought-after analogue of diamonds.

This stone is a source of one of the world’s most demanded metals, without which electric vehicles, mobile phones or wind turbines would not exist.

Until the early 19th century, this stone was often mistaken for emerald. But when the truth had been revealed, people’s interest in the mineral only started to increase, for the rock turned out to be no less rare and highly-demanded.

This rock is of no value to jewellers. Yet thanks to the peculiar shape of its crystals, this dark reddish-brown mineral enjoys unusually high demand.

The predatory appearance of this stone seems to warn of the danger hidden inside it. However, more than one hundred people were destined to die before the secret of the mineral was revealed.

This mineral is most often associated with liquid, which has a sharp characteristic odor. It can be obtained from manure. However, this is no obstacle for making from it candies popular in Europe.

This stone is the official symbol of the American state of Colorado. However, its appearance is more like a flower than a mineral.