Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.

Science 8 September 1967:
Vol. 157. no. 3793, pp. 1173 - 1175
DOI: 10.1126/science.157.3793.1173
Prev | Table of Contents | Next

Articles

Abundance of Type II Diamonds

S. Tolansky 1 and H. Komatsu 1

1 Royal Holloway College, University of London, Egham, Surrey

More than 1300 natural microdiamonds, mostly averaging 0.0015 carat, were studied for transparency to ultraviolet radiation, lgr2537. Of most of them, of this size, 16 percent were completely transparent (presumably type II); 27 percent, completely absorbent (presumably type I). The remainder transmitted partially. The number of type-II diamonds is unexpectedly very high; a considerable proportion of microdiamonds may begin life as type II, later incorporating absorbent type-I material.

To Advertise     Find Products

Science. ISSN 0036-8075 (print), 1095-9203 (online)