The feldspar group contains tectosilicate minerals with similar properties, including orthoclase, albite and labradorite. Feldspars make up more than 60% of the upper crust of the earth.

• 长石系列包含网状矽酸盐的矿物并且有相似的属性；包括正长石；钠长石以及拉长石.；长石构成了60%25的上层地壳