Apatite from Rockport, Essex County, Massachusetts, USA
USA | |
| Dale, Thomas Nelson (1908): The Chief Commercial Granites of MA, NH, and RI. USGS Bulletin 354. |
Dale, Thomas Nelson (1908): The Chief Commercial Granites of MA, NH, and RI. USGS Bulletin 354. | |
| Dale, Thomas Nelson (1908): The Chief Commercial Granites of MA, NH, and RI. USGS Bulletin 354. |