AZUL  BAHIA  GRANITE

 

“Azul Bahia Granite” from eastern Brazil has the reputation for being a very expensive decorative stone.  It's distinctive in having considerable non-iridescent blue coloration.  “Azul Bahia Granite” is a sodalite metasyenite (a.k.a. sodalite foyaite, sodalite foidolite) having sodalite (blue) (Na₄(Al₃Si₃)O₁₂Cl), feldspars & feldspathoids (white), mafic minerals (black), and epidote (greenish) (Ca₂FeAl₂(Si₂O₇)(SiO₄)O(OH)).  It comes from the Itabuna Syenite Complex, a late Neoproterozoic unit (about 676 million years) that intruded through the São Francisco Craton.

 

Locality: commercial quarry at Fazenda Hiassu, city of Itaju do Colonia, southeastern Bahia State, eastern Brazil.

 

Sodalite metasyenite (“Azul Bahia Granite”)

 

 

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