Ma'anar ƙamus na kalmar "pegmatite" wani ƙaƙƙarfan hatsi ne, dutse mai ɓarna mai ɓarna wanda ya ƙunshi lu'ulu'u masu haɗaka na quartz, feldspar, da mica, kuma yana iya ƙunshi wasu ma'adanai kamar tourmaline, beryl, da spodumene. Ana samun Pegmatites sau da yawa a cikin haɗin gwiwa tare da granites da sauran duwatsu masu kutse kuma suna iya zama tushen ma'adanai masu wuya da ƙima.
