I repaired the Table and star facets of this
Pink Spinel while it was still in the ring
The table is the most vulnerable part of a gemstone because it is the highest facet and up there where it can get bumped and scratched.
A jeweler sent me this Spinel which had been chipped. He wanted me to remove the chips without having to remove it from the mounting. This saves the expense and risk of un-mounting and re-mounting the gemstone.
Most of the time I can do the table while it is in the mounting but no other facets. In some occasions I can hold the ring at an angle which enables me to do the star facets also. That was the case with this ring.