GLAUCONITE
\ɡlˈɔːkənˌa͡ɪt], \ɡlˈɔːkənˌaɪt], \ɡ_l_ˈɔː_k_ə_n_ˌaɪ_t]\
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The green mineral characteristic of the greensand of the chalk and other formations. It is a hydrous silicate of iron and potash. See Greensand.
By Oddity Software