This is a very basic fomula that I heard years ago. I’ve loosely
followed it,but arriving at a price for a piece is always challenging.
There are so many variables, retail at shows, vs. wholesale, and then
there is consigment. But, don’t undersell yourself. This simplified
formula, I sorry i can’t even recall exactly who provided it, makes
no considerations for tools, rent , equipment, etc.
Cost of materials (stones, metal) + Labor (set an hourly rate for your
time)+ *also, have a fixed price for any special stone settings or
techniques. Perhaps, in your example an additional amount for each
stamp. Then, add all together and add 20% of the total, for design.
Now, putting a nominal figure on design seems implausible to me.
Maybe that’s why the 20% figure has always stuck in my head. Most
importantly, price must be an amount that you feel is fair and
you’re comforatble with. If a piece has special attributes or unusual
findings, charge for them.