Magma

Published May 18, 2018

Magma

The Earth's crust, that is, the solid, stone shell of the Earth on which we live is a comparatively thin crust on the surface of our planet. Magma is a molten rock mass saturated with various hot gases and superheated water vapor. In its area, very high temperatures and colossal pressures dominate: the earth's crust is a solidified magma...

Apatite

Published May 18, 2018

Apatite

The name of the mineral apatite, which crystallizes in the pyramidal hemihedral section of the hexagonal system, says a lot about its mystery. For a long time it was mixed with aquamarine, fluorspar, hence the name. Apatite forms prismatic crystals (see fig.) with the planes of the pyramid, the base-pinead, is also found in the form of crystalline masses...

Pyrite

Published May 18, 2018

Pyrite

Pyrite (from the Greek word "feast" fire) is a sulfuric or iron pyrite, the most common mineral from the group of sulphides. This mineral is of great technical importance, being at present the main material for the production of sulfuric acid. Mineral pyrite is found in a yellowish or greenish-gray color with metallic sheen...

Properties of minerals

Published May 18, 2018

Properties of minerals

The first properties of minerals are homogeneity, meaning the equality of physical and chemical properties in all or in parallel directions. Homogeneous minerals form two groups. The first group includes amorphous or isotropic minerals. The physical properties of minerals, for example, elasticity, adhesion, electrical conductivity, are equal in all directions...

Hardness of minerals

Published May 18, 2018

Hardness of minerals

To determine the hardness of minerals, the Mohs scale, proposed in 1811 by Friedrich Moos, is widely used in jewelry and gemology. This scale is a list of ten minerals with numbers from 1 to 10, which serve to determine the relative hardness of minerals...

Amethyst

Published May 18, 2018

Amethyst

The name of the mineral amethyst, like many others, is of Greek origin - amethyst is obtained from the word "amethystos" - non-drinker. It expresses the belief of the ancients that this stone protected its owner from drunkenness. Mineral is a beautiful blue or violet variety of quartz, used as an ornament like precious stones...

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