This sample of astrophyllite is displayed in the Smithsonian Museum of Natural History. Astrophyllite contains titanium and manganese. It has the composition (K,Na)₃(Fe,Mn)₇Ti₂Si₈(O,OH)₃₁. It is about 6x8 cm across and is from Mont Saint-Hilaire, Quebec, Canada.

This sample of astrophyllite is about 11x19 cm. It is from Pikes Peak, Colorado.