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Biotite is a mineral belonging to the iron mica category. It is very soft and elastic, easy

Every woman will be delighted with precious stones in jewelry. Not only metal, from

Gold in antiquity Archaeologists around the world still cannot say the year of discovery

Post updated: Oct 9, 2020 Many people think that platinum and white gold are

Rock salt group - rock salt, Steinsalz (often also used to refer to a rock consisting

507-carat Cullinan Heritage Diamond Diamond is the hardest mineral, a cubic polymorphic (allotropic) modification of carbon (C),

Minerals are valuable formations located inside and partially above the earth's crust, their

Category Oxides (minerals) Name in English. Cassiterite Formula SnO2 Group Rutile Group Color Yellow, Brown,

In the Middle Ages, Europeans called Rus' Ruthenia. For them, these lands were the territory of “rebellious tribes”,

If you love intellectual relaxation, then you probably do crossword puzzles or scanword puzzles in your spare time. Certainly,