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Chemical composition Chemical theoretical composition from the formula Cu5FeS4: Cu -63.33; Fe—11.12; S—25.55. Significant

325 alloy today is considered low-grade gold. Since it turns out that the weight

Titanium deposits Titanium is used in metallurgy, medical technology, jewelry and dyeing industries Titanium -

Diamonds of Yakutia Since ancient times, diamonds have been recognized as the most exquisite and expensive jewelry. But the area

P.D. Lunyashin is an adviser to the chairman of the Union of Prospectors of Russia, a veteran of the Far North. Gold mining in Russia

People have long turned to nature for healing, restoration of strength and energy, and improvement of mental state.

Why diamonds? As they say, a girl's best friend is diamonds. They are bright, beautiful,

Diamond is a winner in many categories. It is the hardest, most mysterious and expensive among natural

The fire stone Phlogopite is a unique creation of nature that will not leave any lover indifferent.

The density of a stone is the ratio of the mass of a stone to the mass of water of the same volume. Stone Density