Celestite - Specimen brookite Chemical Composition: SiO₂ + Fe₂O₃

Chemical Composition: SiO₂ + Fe₂O₃

which were built for slicing

Lucas County is one of the best-known American localities for pyritized Devonian fossils from the Silica Formation

pointed shape gives them a sense of purpose and forward motion

and natural fracture patterns still visible

Celestite - Specimen brookite Chemical Composition: SiO₂ + Fe₂O₃Mined from: Sakoany area, Mahajanga Province, Madagascar Description: This one of a kind Celestite mineral specimen from Madagascar features a rounded natural geode form filled with blue grey to smoky blue Celestite crystals. The open cavity reveals glassy, sharply formed crystals with larger points and blocky growths surrounded by smaller sparkling crystals along the rim. The outer matrix is left natural, with pale grey, cream, and earthy beige tones