Beryl

Beryl - mineral hexagonal system, bilicate of aluminum and beryllium, which has a number of varieties (the origin of the name is unknown). Color ordinary beryl yellowish, greenish, bluish, brownish, without even coloring. Colorless beryls are very rare. Glitter is glass, hardness 7,5-8. Crystals translucent or transparent hexahedral prismatic, not infrequent solid grainy masses. Individual crystals reach a length of up to 6 m at a weight of 10-12 kg. When crystallized, prism planes are often covered with vertical strokes; cleavage on the basis of a pineapple, fracture is conchoidal or uneven, hardness 7,5-8, specific gravity 2,67-2,76 g/cm3. It is formed most often in pegmatite veins and in metamorphic rocks.

Beryl is a mineral hexagonal system, bilicate of aluminum and beryllium, which has a number of varieties

Varieties of beryl are distinguished by color. Most known:

  • dark blue - Augustite
  • Greenish-blue - aquamarine;
  • pink - sparrow;
  • honey-yellow - heliodor
  • grass-green - emerald

According to the chemical composition, all these stones were identified as beryls only in the 19th century

According to the chemical composition, all these stones were identified as beryls only in the 19th century, although in ancient times their affinity was mentioned more than once, most probably because emerald or aquamarine plots are found in beryl crystals. In addition, transparent monochrome beryl are very rare, since special conditions are necessary for their formation. True, today there are technological methods that allow, after heat treatment and irradiation, to obtain from ordinary ginger beryl crystals crystals with a noble color of emerald or aquamarine.

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