A mounting medium of known refractive index can be a powerful aid in mineral identification. For example, a medium of 1.540 is useful for distinguishing between feldspars. In addition, the relief of a mineral is, in part, dependent on the r.i. of the cover glass mounting medium. Particularly when scanning a slide at low power, the difference in the relief of various minerals can be a valuable aid in mineral and texture determination.

This tremendous strength allows you to saw and rough grind a much thinner section than with any other mounting medium. Remounting of specimens due to plucking and bond separation is virtually eliminated.

In addition, the long pot life of Petropoxy 154 frees you from having to organize your time so that several specimens can be mounted or covered at the same time. Mounting only one or two sections with Petropoxy 154 is both convenient and efficient.