Jadeite

Published April 14, 2017

Jadeite

The name comes from the Spanish jadeite. Green mineral from the group of alkali clinopyroxene, sodium silicate and aluminum. Jadeite is very rare. Formed in metamorphic rocks under high pressure and relatively low temperature. It occurs together with other pyroxenes: augite, diopside...

Lapis lazuli

Published April 14, 2017

Lapis lazuli

The name comes from the Persian lapis lazuli "blue". This mineral is known long ago. Crystals of his rare, usually found in the form of the Azure rock. Lapis is opaque. The color is violet and indigo blue (in Afghanistan), sky blue, light blue, greenish-blue, yellow. Lapis lazuli has the same color with white and gray spots (carbonates, feldspars, etc.), bright golden inclusions and bright bronze pyrite...

The spinel

Published April 14, 2017

The spinel

Name of spinel derives from the Latin "little thorn" in connection with the form of crystals, or from the Latin "thorn" as coloration of some species like the color of the berry bramble. Spinel was first described in 1546. The dimension of the crystals are usually small, but sometimes there are more than a foot in length...

Moonstone

Published April 14, 2017

Moonstone

Moonstone is a type of feldspar (sodium and potassium aluminum silicate) with a characteristic bluish-silvery sheen. The name given for glowing blue iridescence arising from the structure of the mineral. The mineral is brittle, is very sensitive to shock and compression. Inexperience can sometimes be confused with chalcedony or synthetic spinel...

Marble

Published April 14, 2017

Marble

Marble is extremely stone, and its use is not only the marvelous works of art in Italy and Greece, which we admire in museums. Marble is composed of calcite (CaCO3) with impurities of other minerals, as well as organic compounds. Impurities differently affect its quality by reducing or increasing the decorative effect...

Rhodonite

Published April 14, 2017

Rhodonite

Rhodonite is a manganese silicate. It is result in the special conditions the contact of magma with sediments rich in manganese. Mineral rhodonite is small, in stone-cutting and in fact used rhodonite rock - orlets, which consists of a large number of various manganese minerals. The name comes from the Greek word "pink". Synonym rhodonite: ruby spar...

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