Feldspathoid minerals are a group of tectosilicate minerals that resemble feldspar but have a different structure and a much lower silica content. They occur in rare and unusual magmatic rocks and are not found in rocks containing primary quartz.
Feldspathoid minerals are a group of tectosilicate minerals that resemble feldspar but have a different structure and a much lower silica content. They occur in rare and unusual magmatic rocks and are not found in rocks containing primary quartz.
