Apophyllite from selected localities.
|F. Rutley: "Elements of Mineralogy", 12th Ed. (1900)|
|Heddle, Matthew Foster, 1901, Mineralogy of Scotland ; James Phemister and A. G. MacGregor (1942) Note on Datolite and Other Minerals in a Contact-Altered Limestone at Chapel Quarry, Near Kirkcaldy, Fife. Mineralogical Magazine 26:275-282.|