Four Treasures Reference Database
Record No. 2456
The cleavage in crystals
Journal Article
Halford-Watkins, J.F. (1944) The cleavage in crystals. The Gemmologist, Vol. 13, No. 150, January, pp. 21–22, 24.
Sinkankas/Born No.: NIS/NIB | RWHL
gemology, physical properties, gems