Ƙirƙirar wani nau'i mai mahimmanci na wannan jumla Amygdaloid da kuma hakar ma'adinai sun zama mafi amfani fiye da hakar ma'adinai.
Tabbas, mafi rikitarwa na jumla shine "Amygdaloid da hakar ma'adinai sun zama mafi riba fiye da hakar ma'adinai, kuma yawancin ma'adinai masu nasara sun kasance a kan amygdaloid ko conglomerate lodes. "