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Cat's Eye - Ulexite
Description characteristic of the mineral.
Another stone with the effect of cat's-eye is stone Ulexite (boron natron calcite, mineral subclass of water borates, NaCa(B5O9) х8H2O, in wares often synthetic and very widely in-use). For characteristic brilliance, color and glimmered prolate strip of light polished Ulexite quite often name cat's-eyes. The name Ulexite happened on behalf of the German chemist G.L. Uleks. Enough soft mineral. Be found as hypergene mineral in the deposits of lakes, product of substitution in the clay gypsiferous rocks of hydrochloric domes. Ore of the coniferous forest. In nature of stone Ulexite more frequent than all forms fine-fibrous continuous the masses. Ulexite is crystallized in the monoclinic system and forms fine-fibrous continuous the masses or radially-radiant aggregates of white color. Due to thin parallel fibres there is an effect of bright eye.
The structural feature of Ulexite are long chainlets, consisting of monomers chemical composition of which is reflected by the formula of B5O6(OH) 6. Due to these parallell located tension band the crystals of ulexite possess surprising property. Light passes without distortions only on one of three mutually perpendicular directions. Therefore TV-stone name in popular literature of Ulexite ("televisional", TV-stone).
In the second half XX century simple technology of making of synthetic stone was created, in exactness of repeating both composition and structure of ulexite. Such inexpensive synthetic material is used in a fiberglass, glass-fibre optics. With him make jeweller decorations out of gold and silver. Artificial Ulexite colourless and chemically clean and can be painted admixtures in any color in the process of crystallization, it has the expressed phenomenon of hurrying speck of light at a rotation.
All, that mass and cheap is for a sale in shops as a bijouterie (beads, bangles) is an imitation and imitation of ulexite in glass (easily to get an imitation from cheap fibred boron silicate glass). All, that mass is for a sale in jeweller shops in factory jeweller wares from gold and silver under the name of cat's-eye are standards of the synthetic painted ulexite of jeweller quality (specified on a label, inlay, tab, tag, tip).
Poisonous and radioactive risky hazardous cargo stone and minerals
** - are poisonous stone and minerals (mandatory verification is in the chemical analysis laboratory + on toxicity)
** - are radioactive stone and minerals (mandatory verification on a regular dosimeter + prohibition on the opened sales in the case of radio-activity over 24 milliroentgens / hour + additional measures of protection of people)
All of rare stone are subject obligatory verification on a regular dosimeter on the possible level of radiation and in a chemical laboratory on absence default of poisonous and evaporating components, dangerous for a human people and environment nature
- Free download article Very dangerous and potentially dangerous stone and minerals are in Medical stone therapeutics, with pictures, 2010 year, format of PDF, 2.80 Mb (Presentation from scientific of author K.305 of pictures of very dangerous and potentially dangerous natural stone and minerals which on a bad motive or criminal indifference can be illegally used in criminal and "underground" "Medical stone therapeutics"). Rus langv.
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