Vitric is an adjective that describes something glassy or crystalline. Its antonyms, therefore, would be words that describe materials that are not glassy or crystalline. Some possible antonyms for vitric could include words like dull, matte, or opaque. Other antonyms might include words like rough, porous, or flexible, which describe materials that have a completely different texture and feel than vitric. Ultimately, the choice of antonyms for any given word depends on the context in which it is being used and the specific nuances and connotations of the terms being used.