[en] Possibility of application of ferruginous acid rocks of southeast Georgia (tuffs of Kazreti, Mushevani, Guguti and Arakeli deposits) are studied for reception of white and coloured opacified glasses. On the basis of these rocks have been developed glass mixtures of optimum composition. It has been revealed, that KH₂PO₄ calls more intensive opacification in iron-containing glasses, and among calcium phosphates the best is Ca₃(PO₄)₂. Presence of ferric oxides does not allow to receive some glass of insistent white color. The additive of colouring oxides promotes reception coloured opacified glasses. The received compositions have satisfactory technological and service properties. (author)