Azul Bahia

Azul Bahia

Description of colouring and granulometry: compact uisotropic sodalite syenite, medium-grained and relatively uniform of a deep blue colour with small white spots and a dominant presence of plagioclase and feldspar. The interstices between the layers of feldspar are filled with sodalite, although at times this is replaced by granules of carbonate. Cancrinite can be found in the alteration of the edges of the plagioclase. The sodalite crystals give this particular stone its typical blue colouring. Black biotite and dark green amphibole appear as secondary elements. The bright surface has slight variations. It is quarried in the Fazenda Hiassu in Itaju do Colonia, in the south of the state of Bahia.

Availability: medium.

Other commercial names: Azul Bahia, Azzurro Bahia, Bahia Blue.

Prevailing applications: interior and exterior. Facing and flooring.

Finitions-textures: smooth, polish, flamed.

Mineralogical composition: microcline 51%, sodalite 30%, cancrinite 10%, plagioclase 5%, aegirine 2%, other 2%.

Physical and mechanical properties: volumetric weight: 2545 kg/m3; apparent porosity: 0.10%; absorption coeficient: 0.04 %; compression breaking load: 1726 kg/cm2; bending strength: 170 kg/cm2; coefficient of thermal expansion: 10.07 (mm/m°C)x10-3; shock resistance: 46 cm; wear test: 0.75 mm; static deformability modulus: 58.07 GPa; Mohs hardness: >5.

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Description from
TRE
Collection: materials, manufacturing and uses
ANNUAL STONE
by
Beatrice Zoppas