Word Study
    cronstedtite
CIDE DICTIONARY
cronstedtite, n. 
                                            
                                         A mineral consisting principally of silicate of iron, and crystallizing in hexagonal prisms with perfect basal cleavage; -- so named from the Swedish mineralogist Cronstedt .                                                                                 [1913 Webster]                                                                                                                    
                                                                                    
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