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.
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.
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 rare and beneficial mineral is composed of almost an entire periodic table. However, there are very few deposits where it can be mined — less than a dozen in the whole world, with the largest one located in Russia.
Agate is a pretty common and readily available mineral, two completely identical samples of which do not exist in nature. Each specimen has a unique pattern, the same as with human fingerprints.
This stone is a symbol of aristocracy and impeccable taste. A hundred years ago or so, people were risking their lives to get their hands on it. As a result, mineral-bearing marine animals were almost driven into extinction.