- andalusite hornstone
- андалузитовый роговик
English-Russian mining dictionary. В.П. Манышев.
andalusite hornstone
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Hornfels — (German, meaning hornstone ) is the group designation for a series of contact metamorphic rocks that have been baked and indurated by the heat of intrusive igneous masses and have been rendered massive, hard, splintery, and in some cases… … Wikipedia
