A study of the internal structure of variety III diamonds by X-ray section topography Yu. L. OrlovN. A. BulienkovV. P. Martovitsky OriginalPaper Pages: 105 - 111
Phase and point defect equilibria in the titanomagnetite solid solution Ricardo AragónRobert H. McCallister OriginalPaper Pages: 112 - 120
X-ray topographic study of quartz crystals twinned according to japan twin law Toshikazu YasudaIchiro Sunagawa OriginalPaper Pages: 121 - 127
The twinning microstructure and growth of amethyst quartz A. C. McLarenD. R. Pitkethly OriginalPaper Pages: 128 - 135
Low temperature spectral studies of Mn3+-bearing andalusite and epidote type minerals in the range 30000–5000 cm−1 G. SmithU. HåleniusK. Langer OriginalPaper Pages: 136 - 142
Reassignment of the absorption spectra of purple yoderite K. LangerG. SmithU. Hålenius OriginalPaper Pages: 143 - 145
Physical methods used to determine the geological origin of amber and other fossil resins; some critical remarks: Comment Curt W. Beck ReviewPaper Pages: 146 - 147
