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RM2410   Hyaline quartz
SiO₂
  -  4. Oxides and hydroxides
#1925
Coronel Murta, Minas Gerais, Brazil

Group of very elongated quartz crystals, with developed prisms and well-defined rhombohedral terminal faces. Very transparent. Some faces of the prism show growth oriented cavities.

Size: 6.9 x 4.6 x 3.5 cm.
Main crystal: 6.9 x 1 cm.
Col. J. Astor (Barcelona).
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