noun Скачать 🔗Поделиться Кварц The most abundant mineral on the earth's surface, of chemical composition silicon dioxide, SiO2. It occurs in a variety of forms, both crystalline and amorphous. Found in every environment. Examples : "The geologist found a beautiful piece of quartz in the park. " Геолог нашел красивый кусок кварца в парке. geology mineral material chemistry science environment nature Чат с ИИИгра со словамиПрактика чтения
