1. A study of the internal structure of variety III diamonds by X-ray section topography

   • Yu. L. Orlov
   • N. A. Bulienkov
   • V. P. Martovitsky

   OriginalPaper Pages: 105 - 111

2. Phase and point defect equilibria in the titanomagnetite solid solution

   • Ricardo Aragón
   • Robert H. McCallister

   OriginalPaper Pages: 112 - 120

3. X-ray topographic study of quartz crystals twinned according to japan twin law

   • Toshikazu Yasuda
   • Ichiro Sunagawa

   OriginalPaper Pages: 121 - 127

4. The twinning microstructure and growth of amethyst quartz

   • A. C. McLaren
   • D. R. Pitkethly

   OriginalPaper Pages: 128 - 135

5. Low temperature spectral studies of Mn³⁺-bearing andalusite and epidote type minerals in the range 30000–5000 cm⁻¹

   • G. Smith
   • U. Hålenius
   • K. Langer

   OriginalPaper Pages: 136 - 142

6. Reassignment of the absorption spectra of purple yoderite

   • K. Langer
   • G. Smith
   • U. Hålenius

   OriginalPaper Pages: 143 - 145

7. 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

8. IMA-News

   News Pages: 148 - 148