Epidotes (silicates): Milarit
Diagnostic card.
K Ca 2 Al Be 2 Si 12 O 30 * 5 H 2 O
Shingoniya hexagonal
Hardness 5,5-6
Specific gravity 2.4-2.6
Cleavage is absent
Fracture brittle, brittle
Colorless, green
Color in powder white
Glitter glass
Milarite is a rare mineral. It is represented by prismatic hexagonal crystals, colorless and light gray or greenish. Glitter is glass.
Diagnostic signs.
Milarite crystals do not succumb to the action of acids and melt easily. When heated, it loses water, and the crystals disappear.
Origin.
It occurs in pegmatites, syenites, hydrothermal veins.
Deposits and applications.
It is noted in geodes among granites in Val Guif near Rueras (Switzerland) and in the Valencian mine, Guanajuato district (Mexico). It is also noted in Bavaria and Austria, and in addition - on the Kola Peninsula in Russia. Although milarite is used as a jewel stone, its importance is mainly scientific and collectible.
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Poisonous and radioactive dangerous stones and minerals
** - poisonous stones and minerals (mandatory check in the chemical laboratory + explicit indication of toxicity)
** - radioactive stones and minerals (mandatory check on the standard dosimeter + ban on open sales in case of radioactivity exceeding 24 milli / g / h + additional measures of population protection)
Catalog of minerals and semi-precious stones of the world by groups
** - poisonous stones and minerals
** - radioactive stones and minerals
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