Hey R, Good to hear from you again.
I'd say you were on the right track with checking those old estate auctions.
You never know what you might find. And if they even mention rocks or lapidary, Go!
You ought to try and make it to a big Rock or Gem and Mineral show
in your area sometime and you can see for yourself what folks are trying to
sell the different types of rocks for. See what the market is like.
Get a general idea of value.
I've been trying for some time now and I can tell you,
sanding or grinding, and then putting a polish on large flat surfaces
is about the hardest thing to do. I've got a couple of obsidian slabs
I've all ready put 5-6 hours on and they aren't near satisfactory.
I believe I am going to try a little hand-sanding, too.
I've got silicon carbide paper up to 600 but am going to have to go finer because it's obsidian.
600 might be fine for a lot of rocks.
Polishing is a whole nother art.
If you could make a 12" buffing wheel padded and topped with some soft leather
you'd be in business. Coat that leather with Cerium Oxide,
or Aluminum Oxide, or any of about a dozen other polishing compounds.
Cerium would be the best all round choice. And you can only use one type of compound
on the wheel or else it will be contaminated.
It may be easier, after a little sanding, to use some kindof coating or sealer.
Again, there are dozens to choose from, but I'm old fashioned and prefer to use
pastewax when possible. Paste wax can be removed with ammonia.
It may take several applications.
If it is not paste wax, you could try mineral spirits or MEK,
just be careful not to stain the stone and some rocks it may be better to leave alone.
I understand the mans' little carvings may look hokey,
,
but if you were to try and duplicate any of them you may develope
some more respect for his accomplishments.
Keep on huntin',
Joe