Reply to ‘‘Comment on ‘Ruby at high pressure. I. Optical line shifts to 156 GPa’ ’’

Abstract
In our paper [Phys. Rev. B 40, 5724 (1989)] we made independent interpretations based on published data, and did not intend to quote Vohra, Vanderborgh, Desgreniers, and Ruoff. We believe that the fluorescence published as evidence for pressures of 460–550 GPa in diamond-anvil-cell experiments was due to ruby. Therefore, claims of 460 and 550 GPa are acceptable to within the accuracy of extrapolations of the ruby pressure scale.