Published May 18, 2018
Emerald - a bright green variety beryl. Along with diamond, ruby and sapphire is one of the most majestic and expensive gems. Its dense green color is not found in any other natural transparent mineral. The gem has hexahedral prismatic crystals or splices, hardness 7,5 - 8...
Published May 18, 2018
Age of planet Earth - the time that has passed since the formation of the Earth as an independent planet. For a long time, the age of planet Earth was determined by paleontological findings. Traditionally, the age of the planet Earth is determined based on the radioisotope dating of not only terrestrial samples, but also meteoritic matter...
Published May 18, 2018
How did carbon originate in the rocks of the earth's crust? It originated from organic matter - almost a century this hypothesis prevailed in geological science. She claimed that only in the sedimentary rocks one can find carbon, in others it does not. But gradually, more and more facts accumulated that there is carbon and not in sedimentary deposits...
Published May 18, 2018
Often, large stones in a living organism are formed - both in a healthy body and in a diseased one. In the first case, these are stones that are formed in the choroid of the eyes of some animals, in dead cells of bones, milk stones in the mammary glands. But much more serious are those stones that are formed in diseased organisms from sparingly soluble salts...
Published May 18, 2018
In 1768 in France there was a terrible explosion. Something fell with a whistle, half crashing into the soft earth. Rushed peasants saw fallen stones from the sky. They wanted to raise one stone, but it was so hot that it was impossible to touch it. At that time, the fall to earth of a stone from the sky seemed so incredible that the Paris Academy of Sciences rejected its heavenly origin...
Published May 18, 2018
How to identify minerals? This is to find out what they consist of and how they are called. This issue occurs when minerals are collected and brought home. But this is not an easy task, because only two hundred to three hundred of them are more or less common, and all minerals and their varieties are about three thousand...
