We used to do a of of this with cabs I cut…although we primarily
Please consider making a solid-backed bezel, with rather thin bezel
edges. Then get some hi-temp liquid gasket material from your local
auto supply. It will act not only as a very strong adhesive, but will
also provide some cushioning for the stone as it is flexible when
cured. It is impervious to heat, water, etc., as well, a real
shortcoming of many other adhesives over time.
The thinner-than-usual bezel walls will be a easier to turn over the
stone and look a little better (IMO).
Used with opal or other somewhat fragile stones, the cushioning
quality can be a real plus, in my experience.