Carbonates: Uleksite
Diagnostic card.
Na Ca B 5 O 6 (OH) 6 * 5 (H 2 O)
Triclinic syngene
Hardness 2,5
Specific weight 1.96
Cleavage is perfect
Crack irregular
Color is colorless, colored
Color in powder white
Glitter from glass to silky
Uleksite, or boronatrocalcite, television stone - due to the fibrous structure in the mineral, the effect of the "cat's eye" is manifested. The shine is silky. The stone has the properties of a fiber: if a ulexite is put on a line of a font, the letters "appear" on its surface. For this ulexite is also called a television or TV-stone. Ulexite deposits are available in Argentina, Chile, Canada, USA (California, Nevada).
Uleksite is a colorless or dirty white mineral, occasionally with a greenish haze. Gloss is glass or silky; In most cases the mineral slightly shines through. Crystallizes in the triclinic syngony. Forms crystals that are visible to the naked eye. More common masses and crusts, consisting of rounded concretions, sometimes kidney-shaped with a fibrous internal structure.
Diagnostic signs.
In some cases, the ulexite consists of fibers that are relatively ordered relative to each other. This causes the appearance of a characteristic silky shine. Ulexite is capable of appreciable bluish-green fluorescence in ultraviolet rays. In many cases, it can also phosphoresce in pale straw-yellow tonality.
Origin.
Ulexite is formed as a result of precipitation of precipitates from solutions under arid conditions. Therefore, its deposits can have a relatively large area.
Deposits and applications.
The most famous Boron and Death Valley (California, USA), Iquique (Chile), Bigadich (Turkey) and the Caspian region. In Italy, small crystals and fine crusts of ulexite are found around the outlets of boroniferous springs in Larderello (Tuscany region).
For the characteristic shine, color and flickering elongated strip of light, polished ulexites are often called "cat eyes". It is believed that such stones as ulexite are able to attract attention of other people to their owner, creating around them a certain aura of attention. Modern connoisseurs of the mystical properties of stones believe that decorating with a "cat's eye" ulexite can help to influence other people. Such a stone is able to "remember" the individual qualities of its owner, although such "information imprinting" allegedly does not occur immediately, but only after a long time. With all such intriguing properties of the ulexite, one should be careful with stones with this name, since the world market is literally saturated with "ulexites", which in actual fact turn out to be ordinary glass with different inclusions.
Uleksite (optical). Boron, California, USA. Photo: © А.А. Evseev.
Uleksite (optical). Boron, California, USA. Photo: © А.А. Evseev.
Uleksit, Kramer deposit. Boron, California, USA. Photo: © А.А. Evseev.
Uleksit. Panderma (rn), Turkey. Photo: © А.А. Evseev. Uleksit. Gland with a tangled-fibrous structure.
Kerch Peninsula, Crimea, Ukraine. Photo: © А.А. Evseev.
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Poisonous and radioactive dangerous stones and minerals
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