Syenite

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The syenite is a magmatic Roche plutonic grained of pink color to red. It is made up of alkaline Feldspath, Biotite and Hornblende.

Its name comes from Syène, old name of the town of Assouan (Egypt).

One can add to it, that the obelisk of Louqsor being in the middle of the Place of the Harmony, offered to Louis-Philippe by Méhmét Ali in 1831, is a pink syenite monolith.

The volcanic equivalent of a syenite is a Trachyte. It approaches the Granite but does not contain a quartz.

Épisyénites

The épisyénites result from a leucogranite whose quartz was dissolved by fluids. One can find in the sites released by the quartz of the Minerai S like the Uranium (Pechblende).

Eleolite syenite

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