TY  - JOUR
T1  - On the Structure of Rubies, Sapphires, Diamonds, and Some other Minerals
JF  - Proceedings of the Royal Society of London (1854-1905)
VL  - 17
SP  - 291
EP  - 302
PY  - 1868/01/01/
UR  - http://dx.doi.org/10.1098/rspl.1868.0050
M3  - doi:10.1098/rspl.1868.0050
AU  - Sorby, H.
AU  - Butler, P.
ER  -