  We present adaptive optics high angular resolution ($\sim0\farcs$1)
spectroscopic observations in the 3 $\mu$m region of the Herbig Ae/Be star HD
97048. For the first time, we spatially resolve the emission in the diamond
features at 3.43 and 3.53 $\mu$m and in the adjacent continuum. Using both the
intensity profiles along the slit and reconstructed two-dimensional images of
the object, we derive full-width at half-maximum sizes consistent with the
predictions for a circumstellar disk seen pole-on. The diamond emission
originates in the inner region ($R \lesssim 15$ AU) of the disk.
