While totally recutting and repolishing the stone would doubtless work, if Renee had the proper lapidary equipment, that should be a last resort. Before doing that, I’d suggest soaking the stone in a solvent such as “Attack” EAIaIQobChMIrvS96aL44AIVnCCtBh1ZOgVEEAQYAyABEgKvC_D_BwE which will loosen epoxies and some other glues. Use it with caution, since the fumes are nasty and you don’t want it on your skin either. It shouldn’t damage the stone, although if you notice the solvent turning blue, that will be dye coming out of a doctored piece of lapis.