noun🔗ShareПитчстонA natural glass, rich in microscopic crystallites, formed by the rapid cooling of lava or magma"The sharp edges of the pitchstone found near the volcano were used by early humans to make tools. "Острые края питчстона, найденного возле вулкана, использовались древними людьми для изготовления орудий.geologymaterialChat with AIVocabulary GamePractice Reading
