Coesite from the Dora Maira Massif, Monte Rosa, Italy – miniature specimen as unique piece
This miniature specimen with Coesite from the Dora Maira Massif, Monte Rosa, Italy, shows a light colored, compact matrix with a fine and slightly vitreous texture. The surface appears dense and fairly uniform, with subtle indications of crystalline structure in certain areas.
The Coesite crystals are only weakly differentiated and not developed as distinct individual crystals, yet their presence is clearly reflected in the fine crystalline structure. The crystals form an irregularly textured, matte to slightly lustrous surface, typical for this high pressure mineral.
Geology & Origin
Coesite is a high pressure polymorph of Quartz and forms under extreme pressure conditions, such as those found in subduction zones or during meteorite impacts. The Dora Maira Massif in the western Alps is one of the most famous localities for Coesite worldwide and records processes occurring deep within the Earth’s crust. This specimen is a classic example of formation under ultra high pressure conditions.