KNOW-IT-ALL KID WITH FACTS
The oldest deposit in the world where it was found processed gold is in Bulgaria, near Varna. It dates back 5000 years before Christ!
Gold and copper metals are the first metals processed by people.
In nature, gold is often confused with the mineral „pyrite”. Therefore, pyrite was called „fool's gold”. The difference between gold and pyrite is found easily. Sharp object (knife) placed on pyrite and hit with a hammer, would crush it. In gold - it will leave a deep mark of the blade. Furthermore, the pyrite crystallizes differently.
105 years ago were found the largest diamond in the world mine near Pretoria in South Africa. It was discovered by Frederick Wells. "Cullinan" or "Great Star of Africa", which means the name of rough diamond weighs over 3100 carats, or 622 grams. From the rough gemstone are made 9 large brilliant and 96 smaller diamonds. The largest of them, 530-carat "Тear", is owned by Queen Elizabeth II. This diamond has been in the British crown for years, the other one is also owned by the Royal family.
Ice is a mineral and is formally described in mineralogical system Dana.
Talc is the softest mineral. Talcum powder is usually made of it.
The hardest mineral is the diamond.
Did you know that there is an ancient city, unique with its buildings carved into the rocks where it its Greek name comes from: „Petra”- means rock. It is located in the mountain valley Wadi Musa (Valley of Moses) in Jordan.
The deepest cave on Earth Kruber-Voronya in the Caucasus - 2080 m depth.
The largest island on Earth is Greenland with an area of 2,176,000 sq.m.
Most major cities are Tokyo, with 34 million inhabitants, Mexico City - 22 million people, Seoul - 10 million inhabitants
It is expected that the Earth will be habitable for at least another 500 million years.
National Museum of Earth and Man
Alphabet of minerals