Black ornamental rock

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Thin section (LPA view). The composition of this rock is : plagioclase  (labrador), orthopyroxene, biotite and amphibole. The orthopyroxenes contain fine lamellae (alteration products) which give  to this rock some bronze like reflections.

The LPNA view shows the lamellae in the pyroxenes.

Reflection picture of a polished section of the rock (oblique illumination).