Stone, minerals and semiprecious of the world stone
Silicate: Euclase -->rus

   Diagnostic cart.

   Al Be OH SiO4
   Crystal structure monoclinic
   Hardness on the Mohs scale 7,5
   Specific unit weight mass 3-3,1
   Cleavage perfect absolute
   Fracture, break padman
   Colors colourless, azure sky-blue
   Colors in powder triturate white
   Glance (glitter, glare) glassy

   Euclase - rare jeweller stone. Very perfect absolute cleavage hampers his treatment. A gently-blue color and glassy off-gloss of Euclase is attractive. Appears in pegmatites, be found also in mineral mines deposits. Most known his deposit - in the district of Oru-pretu (Brazil). Be found in India, Zimbabwe, Tanzania, CIS (Ural), Zaire. Entangling is possible with aquamarine, hiddenite.

   Crystallized as prismatic crystals of the extended form, on verges the thin shading is often present. For a mineral a light azure sky-blue color is typical. Comparatively widely widespread and colourless эвклазы; enough rarely there are yellow or greenish-yellow and quite in exceptional cases with a tendency to the blue color. Glance (glitter, glare) glassy, sometimes on the surfaces of cleavage of mother-of-pear nacreous; fracture usually padman.

   Mainly the crystals of Euclase are decorated by collections of mineralogical museums. First Euclase was described in 1702. Gayui. As admixtures Ge is marked, Mn, Si, Sg, Pb, Sn, Zn, Ti, Y, Yb, century Euclase is crystallized in monoclinic Crystal structure, prismatic class of symmetry. In nature Euclase be found as lamellar tabular- prismatic, lamellar tabular, short- and long-prismatic crystals with the large number of verges. The number of simply-shaped, known on the crystals of Euclase, is very great. On the verges of prism shading can be marked. There are twins, where the planes of double it is been (010) and (041), Druses, druses, wall outlets, sheaf-like and hemispheric formations of radially-radiant structure.

   Transparent crystals of Euclase can be colourless or dark blue, blue, blue-, bluish (cyan) - and chlor. Golubovato-green colouring of mineral is related to the presence of admixture of ions of Cr3+. Pleokhroizm in bluish (cyan) - green and yellow-blue tones from weak to strong differentiates for separate deposits. In some crystals there is the uneven zonal colouring with colourless or rather yellow and intense- colored areas. A zonality is possible also in spherulites and sheaf-like aggregates which on periphery are sometimes painted in a bright-blue color, and in a center almost colourless. In ultraviolet rays does not luminesce. At a friction electrified.

   Diagnostic indication.

   Fuse melt hardly; not added the action of acids. Euclase belongs to the in current the use not minerals. Strong brilliance, beautiful color, high enough hardness - on these signs it would take the deserving place among the dearest jeweller stone. But, unfortunately, Euclase possesses large fragility (on Ural it is named by "fragile, frail; brittle") and perfect cleavage (on Greek. ewxkaoic, - well fissioning), that does him extremely uncomfortable material for cutting.

   Euclase, especially in the cut kind, in color and alike some physical properties on Beryl (especially Aquamarine), phenacite, cyanite, Chrysoberyl, Tourmaline, Spodumene (in particular, on hiddenite). In addition, it can serve as the imitation of diamond; true, more low hardness and optical properties allow without the special difficulty to distinguish these two minerals.

   Origin provenance genesis.

   Euclase as shallow crystals be found in granites and crystalline slates. In pegmatites it can arrive at substantial sizes are order a few centimetres. Now and then be found in alluvial sands and pebbles shingle. In nature Euclase appears in the vein, lode, mines of alpine type, in emptinesses of miarolitic pegmatites and greisen, in the hydrothermal deposits of Fluorite-bertrandite-phenaciteof structure, in beryllium of containing feldspar metasomatite, in chloritic slates and mineral deposits (placer, alluvial deposit detritus).

   Deposit minefield mine and use.

   Main deposits are in Brazil. In Italy it is obtained from pegmatitic vein, lode, mines in Valle-aurino (province of Bol'cano); in Europe about him reported from the deposit of Rauris (Austria), where it is present as shallow crystals in an association with an albite. Most considerable alluvial deposits - on the river of Sanarke on Ural. A mineral is used on jeweller business. It is cut in plates and by steps. Separate stone were used for cutting only from Brazil and from Ural.


   A germanium (Ge) is a biological substitute of calcium Ca (on biological functions in orgshanizme alike). A germanium of Ge is a microelement, which in the organism of man promotes efficiency of the immune system of organism, contests with onkozabolevaniyami (treatment of tumours of bones by a radiation), diminishes the pain feelings. Day's necessity of organism of man is 0,4–1,5 mgs (on condition of his replacement a calcium in the future).

   The germanium of Ge is radio-active and well absorbed an organism (about 95%) and relatively evenly distributed on organs and fabrics (both in vnekletochnykh and vnutrikletochnykh spaces). A germanium hatches from an organism mainly with urine (90%). A biological role is in the organism of people. In the organism of man the organic germanium of Ge possesses the wide spectrum of biological activity:

  • renders an antigipoksicheskoe action – provides the transfer of oxygen to fabrics of organism and, carrying oxygen, development of oxygen insufficiency warns at tissue level, diminishes the risk of development of so-called bloody gipoksii, arising up at diminishing of haemoglobin in red corpuscles (zhelezodeficitnaya anaemia);
  • stimulates immunity, repressing the processes of reproduction of microbal cages, activating makrofagi and specific cages of immunity (replaces silver in mikrodozakh);
  • it is protivogribkovye, antiviral and antibakterial'nye characteristics (stimulates producting of interferon for protecting from foreign microorganisms) - replaces gold at the level of oligoelementss;
  • it is a powerful antioxidant – blokatorom of free radicals in an organism;
  • detains development of malignant new formations and hinders appearance of metastases (neutralizes the negatively charged particles of tumour, the same repressing its development is radiation therapy and destruction the radiation of zlokaчеstvennykh tumours of bones, tendons, serosal fabrics and fatty deposits);
  • regulates all of the valvular systems of digestion, peristalsis and venous system;
  • diminishes pain (connections of germanium halt motion of electrons in nervous cages, the same stopping pain).

   The germanium of Ge is prolonged by life of laboratory animals on 25-30% (calcium). Sinergisty and antagonists of germanium of Ge. Present taking about the synergetics action of germanium and selenium. Signs of insufficiency of germanium: development of osteoporosis, increase of risk of development of oncologic diseases. Insufficient maintenance of germanium in a ration is accompanied the damage of bone matrice. Basic signs of surplus of germanium: irritation of skin (at a contact with Gecl2, for example, with the ash of lignite), defeats of liver and buds (at ever-higher doses).

   The germanium of Ge is needed: at the infections of different origin, general mionectic tone of organism, at renewal after the carried diseases, at an osteoporosis, treatment of anaemias and immunodeficient states. Food sources of germanium of Ge: garlic, greenery of garlic, brans, bobs, white mushrooms, tomato juice, fish, squid, mussels, shrimps, laminariya, milk. Accumulates with age in the organism of man and hatches only at a "suckling" diet (raw, sour milk, wheys, curd).

   By a champion on maintenance germanium of Ge among food products yavletsya garlic (does not warn - it is ordinary very dangerous in large volumes food concentrates). A dry garlic contains 750 mcg of germanium of Ge 1 g of dry mass of teeth of garlic. Deputized in the future on a calcium (additional reception of preparation of Ca) - bones at application of germanium become more soft, partly substituted for bone fabric on connecting. On materials: