Looks like Mars rover Perseverance abraded the flat rock it was looking at a few days ago. It then used the SHERLOC instrument to analyze the exposed rock patch.
SHERLOC, the Scanning Habitable Environments with Raman & Luminescence for Organics & Chemicals uses cameras, spectrometers, and a UV laser to search for organics and minerals that have been altered by watery environments and maybe signs of past microbial life.
Here is a look at Perseverance's SHERLOC instrument examining the freshly abraded rock patch. Compare the orientation of the turret at the end of the robotic arm with that in post #1 in the thread. The SHERLOC instrument and camera are located on the "side" of the turret, while the drilling mechanism is located at its end.
As shown in the graphic below of the SHERLOC instrument, the part on the left contains the autofocus mechanism and the optics for laser spectroscopy and for the Context Imager, a monochrome camera whose electronics are located at the top of the graphic. The part on the right is the WATSON 1648x1200 pixel optical camera.
The cylindrical UV laser source and spectrometer are also shown in the diagram.