Aquamarine
An aquamarine stone is a fine once considered semi-precious
stone. It is a variety of beryl, transparent, light blue reminiscent of sea
water Aquamarine is often found in granitic pegmatites.
Azurite
The Azurite is a carbonate mineral azure blue, light blue or
dark. It is a basic copper carbonate produced from other minerals of copper, by
the corrosive action of air and water, similar to the patina-green or gray that
forms on copper Ordinary. The azurite can be used, and malachite, as a pigment.
These two minerals have a vitreous luster and delicate when properly polished
are very ornamental. For a long time, they are used as gems. The characteristic
intense blue azurite is found in most of the tables. Indeed, reduced to fine
powder and mixed with suitable binders, minerals azurite can be transformed
into precious pigments pictorial. Similarly, green pigments were obtained from
malachite.
Beryl
Beryl or beryl, a mineral composed of silicate of beryllium
and aluminum. It is easily recognizable by its morphology and hexagonal
prismatic faces. Beryl, such as tourmaline, a mineral of granite pegmatites. Of
variable size, sometimes very large, is formed at the end of the
crystallization of the granite massifs, when the remaining magma was enriched
in rare elements and water from the magma to start. Mineralizing elements
promote the development of large crystals. In these pegmatite’s, beryl can be
associated with topaz, tourmaline, muscovite and lepidolite in large crystals
of feldspar and quartz. Beryl may also appear in the marbles.
Use: keeps enemies at bay.
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