I’ve done it in jade (nephrite), and have another on the back burner
right now which is to be a ring (size 12) carved out of a single
quartz crystal. It is not difficult to do, but there are survival
issues. In day to day real world I can’t see the all-quartz ring as
having a very long life. The first hard knock in changing a tire or
putting up drywall should about do it. I have explained these to the
client but client wants it anyway.
For strength and long life (which you’d want particularly in a
wedding ring) I would definitely recommend jade. Granite being
composed of intergrown individual crystals, an accidental knock puts
it at risk. The structure of jade however consists of interfelted
mineral fibres, which gives it great toughness.
Rhodonite is similarly, albeit slightly less, tough. But it is pink,
which for a man’s wedding ring may raise eyebrows.
I came across a nice metaphysical justification for short-lifespan
rings recently, in this case for hematite rings which are a dime a
dozen in the trinket stores, and that is, that the ring absorbs all
your negative psychic energies into itself until it breaks and takes
them with it. Now that’s marketing!
Email me off-list if you’d like to go into more detail.