Labradorite from Connecticut, USA
USA | |
| Schooner, Richard. (1958) THE MINERALOGY OF THE PORTLAND-EAST HAMPTON-MIDDLETOWN-HADDAM AREA IN CONNECTICUT (With a few notes on Glastonbury and Marlborough) |
| Foye, Wilbur G. (1926) The occurrence of thulite at Haddam, Connecticut. American Mineralogist, 11 (8) 210-212 |