quartz

باللغة العربية: مَرْو، كَوَارْتْز

1. 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. (countable, uncountable)
2. Crystal meth: methamphetamine hydrochloride. (slang, uncountable)

الجمع quartzes