Occurs in Pinal County.
Chemical Formula: (Mg,Al)5(Si,Al)8O20(OH)2·8H2O
Specific Gravity: 2.1-2.3
Hardness: 2-2.5
Palygorskite, also known as attapulgite, is a clay mineral that often appears as fine, fibrous aggregates. It is used in various applications, including as an absorbent and drilling mud.
Next Pinal County mineral: Paralaurionite