Is there 1 specific epoxy that you would recommend. Does it depend
upon the material you are setting, i.e. glass, gemstone, etc.
Epoxy 220, commonly sold through jewelers supply and lapidary
suppliers, is ideal for this, and made for exactly this type of bond
(metal to metal, metal to stone or glass, stone to stone, etc.) The
"220" version is amber colored. They also make a clear colorless one
called epoxy 330, good when the color of the epoxy is a factor. The
220 is a slightly stronger product, a bit more resistant over time to
water, etc. But the 330 is also a standard widely used epoxy for
this type of work, and is also very durable. I still have some pieces
I put together back in the early 70’s with the aid of epoxy 330 that
are still just fine.
Both types are fairly slow setting, with a working time around 10 to
15 minutes, setting to a tack free state in about an hour, with full
strength reached in 12 to 24 hours, if I remember the label right. If
you’re in a hurry, though, either type can be put under a heat lamp
(an inch away from any ordinary incandescent bulb light does it just
fine). Heated like that, it sets fully in 10 minutes.