Please help with ring. ideas on age, tourquise type, tourquise age, fred harvey era?

Was told 1930s. Obvious ash & gold nail polish was used, it was covered with it. Removed most of nail polish without damage to matrix. it sized up 1. Green from oils and age I hopw, love the cracks,pits. Again, ANY Thoughts! Good and Bad, Thanks to All!
Jonny D.