pycnite Min.
(ˈpɪknaɪt)
[mod. (Haüy 1801) f. Gr. πυκν-ός thick, dense + -ite1.]
A variety of topaz occurring in columnar aggregations.
| 1802 Bournon in Phil. Trans. XCII. 321 The stone called schorlartiger beryl by Werner (the pycnite of the Abbé Hauy). 1866 Lawrence tr. Cotta's Rocks Class. (1878) 31 Pycnite is a fibrous variety of topaz. |