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Corals:
The Lapis lazuli is mixture of different minerals. Most of it is a
sodium aluminium silicate. Lapis lazuli light blue and dark-blue.
Because of this color it is so famous. Parts of this mineral are
always white and gold. The gold parts are Pyrite and the white parts
are Calcite. Since Antiquity the lapis lazuli was often used in
Anterior Asia. Vases and many other things were made of lapis lazuli.
In The Middle Ages it was a coloring material, because it can be
grind. In the Renaissance parts of furniture were made of lapis
lazuli. Until today it is a liked precious stone, but it is not
cheap. The best Lapis lazuli can be found in Afghanistan. Other areas
with Lapis lazuli are in Russia and in Chile.
Data about
the Lapis lazuli
Chemical
formula Na8[SO4|(AlSiO4)6]
Mineral class silicates
Crystal system cubical
Hardness 5.5
Density 2.5 g/cm3
Color blue,
light blue
Line color
light blue
Gloss fat gloss
Break shell
Fissileness none |
