Cedric, I'll comment on one specific aspect of what you said, and it's not the jewelry aspect. As someone else pointed out, diamonds can be fraught with difficulty, but I'm not addressing that side of things. You said:
Cedric .:
My business encourages desire on the part of the would be customer in order that the item sell.
It's certainly
possible to sell in that way -- to be a "
want maker". And in fact, I'd tend to agree with you that there are problems with that approach if you tend to the Buddhist approach to things. How can we regard the Four Noble Truths as useful and then work to make it hard for others to heed them?
But selling can also be simply serving someone else. In fact, I reckon it's most effectively done if you have that approach (see for example the work of Bill Caskey and his team with the
Advanced Selling Podcast). If you were a doctor trying to explain to someone who thought they had indigestion that they actually had heart disease, would you feel bad about "selling" your view (and subsequent medication or surgery)? No, of course not.
As I say, I'm not talking about the specifics of any given product. For example, it's hard to imagine how selling tainted heroin to an addict could ever be anything but evil. But it's not "selling" per se that is bad.
As an aside -- I guess you'll have read "The Diamond Cutter" by Michael Roach? I don't endorse the book in total, but I did really enjoy it at the time, and found it thought provoking. (I later found out more about Roach and became less impressed by his book, but that's neither here nor there :-) )